James Owens v. Republic of Sudan , 864 F.3d 751 ( 2017 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued October 11, 2016               Decided July 28, 2017
    No. 14-5105
    JAMES OWENS, ET AL.,
    APPELLEES
    v.
    REPUBLIC OF SUDAN, MINISTRY OF EXTERNAL AFFAIRS AND
    MINISTRY OF THE INTERIOR OF THE REPUBLIC OF THE SUDAN,
    APPELLANTS
    Consolidated with 14-5106, 14-5107, 14-7124, 14-7125,
    14-7127, 14-7128, 14-7207, 16-7044, 16-7045, 16-7046,
    16-7048, 16-7049, 16-7050, 16-7052
    Appeals from the United States District Court
    for the District of Columbia
    (No. 1:01-cv-02244)
    (1:08-cv-01377)
    (1:10-cv-00356)
    (1:12-cv-01224)
    (1:08-cv-01349)
    (1:08-cv-01361)
    (1:08-cv-01380)
    2
    Christopher M. Curran argued the cause for appellants.
    With him on the briefs were Nicole Erb, Claire A. DeLelle, and
    Celia A. McLaughlin. Bruce E. Fein entered an appearance.
    Stuart H. Newberger and Matthew D. McGill argued the
    causes for appellees James Owens, et al. With them on the
    brief were Clifton S. Elgarten, Aryeh S. Portnoy, Emily Alban,
    John L. Murino, Jonathan C. Bond, Michael R. Huston, Steven
    R. Perles, Edward B. MacAllister, John Vail, Thomas Fortune
    Fay, Jane Carol Norman, Michael J. Miller, and David J.
    Dickens. Annie P. Kaplan, John D. Aldock, and Stephen A.
    Saltzburg, entered appearances.
    Before: HENDERSON and ROGERS, Circuit Judges, and
    GINSBURG, Senior Circuit Judge.
    Opinion for the Court filed by Senior Circuit Judge
    GINSBURG.
    3
    Table of Contents
    I.         Background                                               5
    A.          The FSIA Terrorism Exception                      6
    B.          History of this Litigation                       11
    II.             Extrajudicial Killings                             19
    A.          Textual Arguments                                21
    1.     State action requirements under international law 21
    2.     International law and the TVPA                   24
    3. State action requirements in the TVPA and the FSIA
    terrorism exception                                27
    B.          Statutory Purpose                                31
    C.          Statutory History                                33
    III.            Sufficiency of the Evidence Supporting Jurisdiction 36
    A.          The Evidentiary Hearing                          39
    1.     The sources of evidence presented                39
    2.     The district court’s findings of fact            42
    B.          Standard of Review                               48
    C.          Admissibility of the Evidence                    52
    1.     The expert testimony                             53
    2.     The State Department reports                     63
    D.          Sufficiency of the Evidence                      66
    1.     Proximate causation                              67
    2.     Sudan’s specific intent                          76
    IV.             Timeliness of Certain Claims                       78
    V.      Jurisdiction and Causes of Action for Claims of Third
    Parties                                                   88
    4
    A.          Jurisdiction                                    89
    B.          Causes of Action                                94
    C.          Intentional Infliction of Emotional Distress    98
    VI.         Punitive Damages                                 103
    A.          Whether to Review the Awards of Punitive Damages
    104
    B.          Retroactivity of Punitive Damages Under § 1605A(c)
    107
    1.     Section 1605A operates retroactively           108
    2.     Clear statement of retroactive effect          111
    C.          Retroactivity of Punitive Damages Under State Law
    114
    VII.        Vacatur Under Rule 60(b)                         115
    A.          Excusable Neglect Under Rule 60(b)(1)          116
    B.          Extraordinary Circumstances Under Rule 60(b)(6)
    127
    GINSBURG, Senior Circuit Judge: On August 7, 1998
    truck bombs exploded outside the United States embassies in
    Nairobi, Kenya and in Dar es Salaam, Tanzania. The
    explosions killed more than 200 people and injured more than
    a thousand. Many of the victims of the attacks were U.S.
    citizens, government employees, or contractors.
    As would later be discovered, the bombings were the work
    of al Qaeda, and only the first of several successful attacks
    against U.S. interests culminating in the September 11, 2001
    attack on the United States itself. From 1991 to 1996, al Qaeda
    and its leader, Usama bin Laden, maintained a base of
    operations in Sudan. During this time, al Qaeda developed the
    terrorist cells in Kenya and Tanzania that would later launch
    5
    the embassy attacks. This appeal considers several default
    judgments holding Sudan liable for the personal injuries
    suffered by victims of the al Qaeda embassy bombings and
    their family members.
    I.   Background
    Starting in 2001 victims of the bombings began to bring
    suits against the Republic of Sudan and the Islamic Republic of
    Iran, alleging that Sudan, its Ministry of the Interior, Iran, and
    its Ministry of Information and Security materially supported
    al Qaeda during the 1990s. Specifically, the plaintiffs
    contended Sudan provided a safe harbor to al Qaeda and that
    Iran, through its proxy Hezbollah, trained al Qaeda militants.
    In bringing these cases, the plaintiffs relied upon a provision in
    the Foreign Sovereign Immunity Act (FSIA) that withdraws
    sovereign immunity and grants courts jurisdiction to hear suits
    against foreign states designated as sponsors of terrorism. 
    28 U.S.C. § 1605
    (a)(7). This provision and its successor are
    known as the “terrorism exception” to foreign sovereign
    immunity.
    Initially, neither Sudan nor Iran appeared in court to
    defend against the suits. In 2004 Sudan secured counsel and
    participated in the litigation. Within a year, its communication
    with and payment of its attorneys ceased but counsel continued
    to litigate until allowed to withdraw in 2009. In the years that
    followed, several new groups of plaintiffs filed suits against
    Sudan and Iran. The sovereign defendants did not appear in any
    of these cases, and in 2010 the district court entered defaults in
    several of the cases now before us. After an evidentiary hearing
    in 2010 and the filing of still more cases, the court in 2014
    entered final judgments in all pending cases. Sudan then
    reappeared, filing appeals and motions to vacate the judgments.
    6
    The district court denied Sudan’s motions to vacate, and Sudan
    again appealed.
    Today we address several challenges brought by Sudan on
    direct appeal of the default judgments and collateral appeal
    from its motions to vacate. Most of Sudan’s contentions require
    interpretation of the FSIA terrorism exception, to which we
    now turn.
    A. The FSIA Terrorism Exception
    Enacted in 1976, the FSIA provides the sole means for
    suing a foreign sovereign in the courts of the United States.
    Argentine Republic v. Amerada Hess Shipping Corp., 
    488 U.S. 428
    , 439 (1989). A foreign state is presumptively immune from
    the jurisdiction of the federal and state courts, 
    28 U.S.C. § 1604
    , subject to several exceptions codified in §§ 1605,
    1605A, 1605B, and 1607.
    When first enacted, the FSIA generally codified the
    “restrictive theory” of sovereign immunity, which had
    governed sovereign immunity determinations since 1952.
    Under the restrictive theory, states are immune from actions
    arising from their public acts but lack immunity for their
    strictly commercial acts. Verlinden B.V. v. Cent. Bank of
    Nigeria, 
    461 U.S. 480
    , 487-88 (1983). Thus, the original
    exceptions in the FSIA withdrew immunity for a sovereign’s
    commercial activities conducted in or causing a direct effect in
    the United States, 
    28 U.S.C. § 1605
    (a)(2), and for a few other
    activities not relevant here. See 
    28 U.S.C. § 1605
    (a)(1)-(6).
    None of the original exceptions in the FSIA created a
    substantive cause of action against a foreign state. Rather, the
    FSIA provided “the foreign state shall be liable in the same
    manner and to the same extent as a private individual under like
    7
    circumstances” except that it prohibited the award of punitive
    damages against a sovereign. 
    28 U.S.C. § 1606
    . As a result, a
    plaintiff suing a foreign sovereign typically relied upon state
    substantive law to redress his grievances. In this way, the FSIA
    “operate[d] as a ‘pass-through’ to state law principles,”
    Pescatore v. Pan Am. World Airways, Inc., 
    97 F.3d 1
    , 12 (2d
    Cir. 1996), granting jurisdiction yet leaving the underlying
    substantive law unchanged, First Nat’l City Bank v. Banco
    Para El Comercio Exterior de Cuba, 
    462 U.S. 611
    , 620 (1983).
    Until 1996 the FSIA provided no relief for victims of a
    terrorist attack. Courts consistently rebuffed plaintiffs’ efforts
    to fit terrorism-related suits into an existing exception to
    sovereign immunity. See, e.g., Saudi Arabia v. Nelson, 
    507 U.S. 349
     (1993); Cicippio v. Islamic Republic of Iran, 
    30 F.3d 164
     (D.C. Cir. 1994); Smith v. Socialist People’s Libyan Arab
    Jamahiriya, 
    886 F. Supp. 306
     (E.D.N.Y. 1995). This changed
    with the passage of the Antiterrorism and Effective Death
    Penalty Act (AEDPA) of 1996, Pub. L. No. 104-132, 
    110 Stat. 1214
    , which added a new exception to the FSIA withdrawing
    immunity and granting jurisdiction over cases in which
    money damages are sought against a foreign
    state for personal injury or death that was
    caused by an act of torture, extrajudicial killing,
    aircraft sabotage, hostage taking, or the
    provision of material support or resources . . .
    for such an act if such act or provision of
    material support is engaged in by an official,
    employee, or agent of such foreign state while
    acting within the scope of his or her office,
    employment, or agency.
    
    Id.
     at § 221, 110 Stat. at 1241-43 (codified at 
    28 U.S.C. § 1605
    (a)(7) (2006) (repealed)).
    8
    This new “terrorism exception” applied only to (1) a suit
    in which the claimant or the victim was a U.S. national, 
    28 U.S.C. § 1605
    (a)(7)(B)(ii), and (2) the defendant state was
    designated a sponsor of terrorism under State Department
    regulations at or around the time of the act giving rise to the
    suit, § 1605(a)(7)(A) (referencing 50 U.S.C. App. § 2405(j)
    and 
    22 U.S.C. § 2371
    ). The AEDPA also set a filing deadline
    for suits brought under the new exception at ten years from the
    date upon which a plaintiff’s claim arose. 
    28 U.S.C. § 1605
    (f).
    Initially, there was some confusion about whether the new
    exception created a cause of action against foreign sovereigns.
    See In re Islamic Republic of Iran Terrorism Litig., 
    659 F. Supp. 2d 31
    , 42-43 (D.D.C. 2009). Within five months of
    enacting the AEDPA, the Congress clarified the situation with
    an amendment, codified as a note to the FSIA, Pub. L. No. 104-
    208, § 589, 
    110 Stat. 3009
    , 3009-172 (1996) (codified at 
    28 U.S.C. § 1605
     note), which provides:
    [A]n official, employee, or agent of a foreign
    state designated as a state sponsor of terrorism
    . . . while acting within the scope of his or her
    office, employment, or agency shall be liable to
    a United States national or the national’s legal
    representative for personal injury or death
    caused by acts of that official, employee, or
    agent for which the courts of the United States
    may maintain jurisdiction under section
    1605(a)(7) of title 28, United States Code, for
    money damages which may include economic
    damages, solatium, pain, and suffering, and
    punitive damages if the acts were among those
    described in section 1605(a)(7).
    9
    This amendment was known as the Flatow Amendment
    after Alisa Flatow, a Brandeis University student mortally
    wounded in a suicide bombing in the Gaza Strip. The Flatow
    Amendment, which the Congress intended to deter state
    support for terrorism, (1) provided a cause of action against
    officials, employees, or agents of a designated state sponsor of
    terrorism and (2) authorized the award of punitive damages
    against such a defendant. These two changes marked a
    departure from the other FSIA exceptions, none of which
    provided a cause of action or allowed for punitive damages. See
    
    28 U.S.C. § 1606
    .
    Although it referred in terms only to state officials, for a
    time some district courts read the Flatow Amendment and
    § 1605(a)(7) to create a federal cause of action against foreign
    states themselves. See, e.g., Kilburn v. Republic of Iran, 
    277 F. Supp. 2d 24
    , 36-37 (D.D.C. 2003). But see Roeder v. Islamic
    Republic of Iran, 
    195 F. Supp. 2d 140
    , 171 (D.D.C. 2002). In
    Cicippio-Puleo v. Islamic Republic of Iran, we rejected this
    approach, holding that “neither 
    28 U.S.C. § 1605
    (a)(7) nor the
    Flatow Amendment, nor the two considered in tandem, creates
    a private right of action against a foreign government.” 
    353 F.3d 1024
    , 1033 (D.C. Cir. 2004). We based this conclusion
    upon the plain text of the Flatow Amendment – which applied
    only to state officials – and upon the function of all the other
    exceptions to the FSIA, which withdraw immunity but leave
    the substantive law of liability unchanged. 
    Id. at 1033-34
    (noting the “settled distinction in federal law between statutory
    provisions that waive sovereign immunity and those that create
    a cause of action”). Because there was no federal cause of
    action, we remanded the case “to allow plaintiffs an
    opportunity to amend their complaint to state a cause of action
    under some other source of law, including state law.” 
    Id. at 1036
    . Hence, a plaintiff proceeding under the terrorism
    10
    exception would follow the same pass-through process that
    governed an action under the original FSIA exceptions.
    The pass-through approach, however, produced
    considerable difficulties. In cases with hundreds or even
    thousands of claimants, courts faced a “cumbersome and
    tedious” process of applying choice of law rules and
    interpreting state law for each claim. See Iran Terrorism Litig.,
    
    659 F. Supp. 2d at 48
    . Differences in substantive law among
    the states caused recoveries to vary among otherwise similarly
    situated claimants, denying some any recovery whatsoever. See
    Peterson v. Islamic Republic of Iran, 
    515 F. Supp. 2d 25
    , 44-
    45 (D.D.C. 2007) (denying recovery for intentional infliction
    of emotional distress to plaintiffs domiciled in Pennsylvania
    and Louisiana while permitting recovery for plaintiffs from
    other states).
    The Congress addressed these problems in 2008. Section
    1083 of the National Defense Authorization Act for Fiscal Year
    2008 (NDAA) repealed § 1605(a)(7) and replaced it with a new
    “Terrorism exception to the jurisdictional immunity of a
    foreign state.” Pub. L. No. 110-181, § 1083, 
    122 Stat. 3
    , 338-
    44 (2008) (hereinafter NDAA) (codified at 28 U.S.C.
    § 1605A). The new exception withdrew immunity, granted
    jurisdiction, and authorized suits against state sponsors of
    terrorism for “personal injury or death” arising from the same
    predicate acts – torture, extrajudicial killing, aircraft sabotage,
    hostage taking, and the provision of material support – as had
    the old exception. 28 U.S.C. § 1605A(a)(1). Jurisdiction for
    suits under the new exception extended to “claimants or
    victims” who were U.S. nationals, and for the first time, to
    members of the armed forces and to government employees or
    contractors acting within the scope of their employment. 28
    U.S.C. § 1605A(a)(2)(A)(ii). Most important, the new
    exception authorized a “[p]rivate right of action” against a state
    11
    over which a court could maintain jurisdiction under
    § 1605A(a). 28 U.S.C. § 1605A(c). By doing so, the Congress
    effectively abrogated Cicippio-Puleo and provided a uniform
    source of federal law through which plaintiffs could seek
    recovery against a foreign sovereign. Iran Terrorism Litig., 
    659 F. Supp. 2d at 59
    . A claimant who was a U.S. national, military
    service member, government employee or contractor acting
    within the scope of his employment, and the claimant’s legal
    representative could make use of this cause of action. As with
    the Flatow Amendment but unlike § 1605(a)(7), the NDAA
    authorized awards of punitive damages under the new federal
    cause of action. The exception also provided claimants a host
    of other new benefits not relevant here.
    Like its predecessor, the new exception contained a ten-
    year limitation period on claims brought under § 1605A.
    Notwithstanding the limitation period, the NDAA provided
    two means of bridging the gap between the now-repealed
    § 1605(a)(7) and the new § 1605A. Claimants with claims
    “before the courts in any form” who had been adversely
    affected by the lack of a federal cause of action in § 1605(a)(7)
    could move to convert or refile their cases under § 1605A(c).
    NDAA § 1083(c)(2). Furthermore, “[i]f an action arising out of
    an act or incident has been timely commenced under section
    1605(a)(7) or [the Flatow Amendment],” then a claimant could
    bring a “related action” “arising out of the same act or incident”
    within 60 days of the entry of judgment in the original action
    or of the enactment of the NDAA, whichever was later. NDAA
    § 1083(c)(3). Each of these provisions is examined below in
    greater detail as they relate to Sudan’s arguments.
    B. History of this Litigation
    This appeal follows 15 years of litigation against Sudan
    arising from the 1998 embassy bombings. In October 2001
    12
    plaintiff James Owens filed the first lawsuit against Sudan and
    Iran for his personal injuries. Other plaintiffs joined the Owens
    action in the following year. These included individuals (or the
    legal representatives of individuals) killed or injured in the
    bombings, who sought recovery for their physical injuries (or
    deaths), and the family members of those killed or injured, who
    sued for their emotional distress. The Owens complaint alleged
    that the embassy bombings were “extrajudicial killings” under
    the FSIA and that Sudan provided material support for the
    bombings by sheltering and protecting al Qaeda during the
    1990s.
    When Sudan failed to appear, the district court entered an
    order of default in May 2003. The default was translated into
    Arabic and sent to Sudan in accordance with 
    28 U.S.C. § 1608
    (e). In February 2004 Sudan secured counsel and in
    March 2004 moved to vacate the default and to dismiss the
    Owens action. Sudan argued, among other things, it remained
    immune under the FSIA because the plaintiffs had not
    adequately pleaded facts showing it had materially supported
    al Qaeda or that its support had caused the bombings. Sudan
    attached to its motion declarations from a former U.S.
    Ambassador to Sudan and a former FBI agent stating that it
    neither assisted al Qaeda nor knew of the group’s terrorist aims
    during the relevant period.
    In March 2005 the district court granted, in part, Sudan’s
    motion to dismiss and vacated the order of default. Owens v.
    Republic of Sudan, 
    374 F. Supp. 2d 1
    , 9-10 (D.D.C. 2005)
    (Owens I). The court, however, allowed the plaintiffs to amend
    their complaint in order to develop more fully their allegations
    of material support. 
    Id. at 15
    . The court further noted that
    although “the Sudan defendants severed ties to al Qaeda two
    years before the relevant attacks,” this timing did not
    necessarily foreclose the conclusion that Sudan had “provided
    13
    material support within the meaning of the statute and that this
    support was a proximate cause of the embassy bombings.” 
    Id. at 17
    .
    The plaintiffs then amended their complaint, and Sudan
    again moved to dismiss. Sudan once again argued the
    complaint had not sufficiently alleged material support and that
    any support it provided was not a legally sufficient cause of the
    embassy bombings. Assuming the truth of the plaintiffs’
    allegations, the district court denied Sudan’s motion in its
    entirety. Owens v. Republic of Sudan, 
    412 F. Supp. 2d 99
    , 108,
    115 (D.D.C. 2006) (Owens II).
    While the motions to dismiss were pending, difficulties
    arose between Sudan and its counsel. After filing the first
    motion to dismiss, Sudan’s initial counsel withdrew due to a
    conflict of interest with the Iranian codefendants. Sudan
    retained new counsel, but their relationship soon deteriorated.
    Starting in January 2005 new counsel filed several motions to
    withdraw, citing Sudan’s unresponsiveness and failure to pay
    for legal services. Sudan’s last communication with counsel
    was in September 2008. The district court eventually granted a
    final motion to withdraw in January 2009, leaving Sudan
    without representation.
    Despite these difficulties, counsel for Sudan continued to
    defend their client until the court granted the motion to
    withdraw in January 2009. Following the denial of its second
    motion to dismiss, Sudan pursued an interlocutory appeal to
    this court. Its appeal, in part, challenged the legal sufficiency
    of the plaintiffs’ allegations that Sudan’s material support had
    caused the embassy bombings. In July 2008 we affirmed the
    district court’s decision, holding that “[a]ppellees’ factual
    allegations and the reasonable inferences that can be drawn
    therefrom show a reasonable enough connection between
    14
    Sudan’s interactions with al Qaeda in the early and mid-1990s
    and the group’s attack on the embassies in 1998” to maintain
    jurisdiction under the FSIA. Owens v. Republic of Sudan, 
    531 F.3d 884
    , 895 (D.C. Cir. 2008) (Owens III). We then remanded
    the case to allow the plaintiffs to pursue the merits of their
    claims.
    Shortly after our decision, several new groups of plaintiffs
    filed actions against Sudan and Iran arising from the embassy
    bombings. These actions – brought by the Wamai, Amduso,
    Mwila, and Osongo plaintiffs – were filed after the enactment
    of the new terrorism exception and before the expiration of its
    limitation period. This brought the total number of suits against
    Sudan to six, including the original Owens action and a suit
    filed by the Khaliq plaintiffs under § 1605(a)(7).
    From that point on, neither Sudan nor its counsel
    participated in the litigation again until after the 2014 entry of
    final judgment in Owens. After entering new orders of defaults
    against Sudan in several of the pending actions, the court held
    a consolidated evidentiary hearing in order to satisfy a
    requirement in the FSIA that “the claimant establish[] his claim
    or right to relief by evidence satisfactory to the court.” 
    28 U.S.C. § 1608
    (e). Without considering this evidence, the court
    could not transform the orders of default into enforceable
    default judgments establishing liability and damages against
    Sudan.
    For three days, the district court heard expert testimony
    and reviewed exhibits detailing the relationship between both
    Iran and Sudan and al Qaeda during the 1990s. Shortly after
    this hearing the district court held both defendants liable for
    materially supporting the embassy bombings. Owens v.
    Republic of Sudan, 
    826 F. Supp. 2d 128
    , 157 (D.D.C. 2011)
    (Owens IV). More specifically, the district court found Sudan
    15
    had provided al Qaeda a safe harbor from which it could
    establish and direct its terrorist cells in Kenya and Tanzania.
    
    Id. at 139-43, 146
    . The court further found Sudan provided
    financial, military, and intelligence assistance to the terrorist
    group, which allowed al Qaeda to avoid disruption by hostile
    governments while it developed its capabilities in the 1990s.
    
    Id. at 143-46
    . These findings established both jurisdiction over
    and substantive liability for claims against Sudan and Iran.
    The court also addressed the claims of non-American
    family members of those killed or injured in the bombings.
    Although those plaintiffs could not make use of the federal
    cause of action in § 1605A(c), the court concluded they could
    pursue claims under state law, as was the practice under the
    previous terrorism exception. Id. at 153. The court’s opinion
    was translated into Arabic and served upon Sudan in
    September 2012.
    The district court then referred the cases to special masters
    to hear evidence and recommend the amounts of damages to be
    awarded. While this process was ongoing, two new sets of
    plaintiffs entered the litigation. In July 2012 the Opati plaintiffs
    filed suit against Sudan, claiming their suits were timely as a
    “related action” with respect to the original Owens litigation.
    In May 2012 the Aliganga plaintiffs sought to intervene in the
    Owens suit. Notwithstanding the expiration of the ten-year
    limitation period starting from the date of the bombings, the
    district court allowed both groups of plaintiffs to proceed
    against Sudan and to rely upon the court’s factual findings of
    jurisdiction and liability. The court then referred the Aliganga
    and Opati claims to the special masters.
    In 2014 the district court entered final judgments in favor
    of the various plaintiffs. All told, the damages awarded against
    Sudan came to more than $10.2 billion. Family members, who
    16
    outnumbered those physically injured by the bombing,
    received the bulk of the award – over $7.3 billion. Of the total
    $10.2 billion, approximately $4.3 billion was punitive
    damages. See, e.g., Opati v. Republic of Sudan, 
    60 F. Supp. 3d 68
    , 82 (D.D.C. 2014).
    Within a month of the first judgments, Sudan retained
    counsel and reappeared in the district court. Sudan appealed
    each case and in April 2015 filed motions in the district court
    to vacate the default judgments under Federal Rule of Civil
    Procedure 60(b). We stayed the appeals pending the district
    court’s ruling on the motions.
    In those motions, Sudan raised a number of arguments for
    vacatur, most of them challenging the district court’s subject
    matter jurisdiction. As before, Sudan also attacked the
    plaintiffs’ evidence. It argued the judgments were void because
    they rested solely upon inadmissible evidence to prove
    jurisdictional facts, which Sudan argued was impermissible
    under § 1608(e). It also argued the evidence did not show it
    proximately caused the bombings because al Qaeda did not
    become a serious terrorist threat until after Sudan had expelled
    bin Laden in 1996.
    Sudan raised a host of new arguments as well. In its most
    sweeping challenge, Sudan argued it did not provide material
    support for any predicate act that would deprive it of immunity
    under the FSIA. In making this argument, Sudan contended the
    embassy bombings, carried out by al Qaeda, were not
    “extrajudicial killings” because that term requires the
    involvement of a state actor in the act of killing. Sudan also
    contended the claims brought by the Opati, Aliganga, and
    Khaliq plaintiffs were barred by the statute of limitation in
    17
    § 1605A(b) which, it argued, deprived the court of jurisdiction
    to hear their suits. 1
    Sudan’s last jurisdictional challenge took aim at the family
    members of those physically injured or killed by the bombings.
    Sudan argued that the court could hear claims only from a
    person who was physically harmed or killed by the bombings
    or the legal representative of that person. And even if
    jurisdiction was proper, Sudan contended, foreign (i.e., non-
    U.S.) family members could not state a claim under either the
    federal cause of action or state law.
    Finally, Sudan raised two nonjurisdictional arguments:
    First, it urged the district court to vacate its awards of punitive
    damages to the plaintiffs proceeding under state law,
    contending § 1605A(c) is the sole means for obtaining punitive
    damages against a foreign state. Second, Sudan argued the
    court should vacate the default judgments under Federal Rule
    of Civil Procedure 60(b) for “extraordinary circumstances” or
    “excusable neglect” on Sudan’s part. In support of the latter
    argument, Sudan submitted a declaration from the Sudanese
    Ambassador to the United States detailing the country’s
    troubled history of civil unrest, natural disaster, and disease,
    which allegedly impeded Sudan’s participation in the
    litigation.
    After a consolidated hearing, the district court denied the
    motions to vacate in all respects. Owens v. Republic of Sudan,
    
    174 F. Supp. 3d 242
     (D.D.C. 2016) (Owens V). Sudan appealed
    and its appeal was consolidated with its earlier appeals from
    the final judgments. Sudan’s briefs before this court are
    directed primarily to the district court’s jurisdiction, and
    1
    As we discuss infra, the Khaliq plaintiffs later asserted claims under
    § 1605A.
    18
    present novel questions of law, which we review de novo. See
    Jerez v. Republic of Cuba, 
    775 F.3d 419
    , 422 (D.C. Cir. 2014).
    Ordinarily, all of Sudan’s nonjurisdictional arguments would
    be forfeited by reason of its having defaulted in the district
    court. See Practical Concepts, Inc. v. Republic of Bolivia, 
    811 F.2d 1543
    , 1547 (D.C. Cir. 1987). In this case, however, due to
    the size of the judgments against Sudan, their possible effects
    upon international relations, and the likelihood that the same
    arguments will arise in future litigation, we exercise our
    discretion to consider some, but not all, of Sudan’s
    nonjurisdictional objections. See Acree v. Republic of Iraq, 
    370 F.3d 41
    , 58 (D.C. Cir. 2004) (“while we will ordinarily refrain
    from reaching non-jurisdictional questions that have not been
    raised by the parties . . . we may do so on our own motion in
    ‘exceptional circumstances’”).
    At the end of the day, we affirm the judgments in most
    respects, holding the FSIA grants jurisdiction over all the
    claims and claimants present here. We hold also that those
    plaintiffs ineligible to proceed under the federal cause of action
    may continue to press their claims under state law. We also
    vacate all the awards of punitive damages and certify a question
    of local tort law to the District of Columbia Court of Appeals.
    We turn first to Sudan’s challenges to the district court’s
    subject matter jurisdiction, starting with those that would
    dispose of the entire case. In Part II we address Sudan’s
    challenge to the meaning of “extrajudicial killings” under the
    FSIA. In Part III we review the sufficiency of the evidence
    supporting the conclusions that Sudan provided material
    support to al Qaeda and that this support was a jurisdictionally
    sufficient cause of the embassy bombings.
    We then proceed to Sudan’s jurisdictional challenges that
    would eliminate the claims of particular plaintiffs. In Part IV
    19
    we consider whether some of the plaintiffs’ claims are barred
    by the statute of limitation in the FSIA terrorism exception,
    which Sudan contends is jurisdictional. In Part V we address
    both jurisdictional and nonjurisdictional arguments opposing
    the claims of the family members of victims physically injured
    or killed by the embassy bombings. Finally, we address
    Sudan’s purely nonjurisdictional arguments in Part VI –
    whether the new terrorism exception authorizes punitive
    damages for a sovereign’s pre-enactment conduct – and
    Part VII – addressing Sudan’s arguments for vacatur under
    Rule 60(b)(1) and 60(b)(6).
    II.   Extrajudicial Killings
    Sudan first argues the 1998 embassy bombings were not
    “extrajudicial killings” within the meaning of the FSIA
    terrorism exception. As noted above, § 1605A divests a foreign
    state of immunity and grants courts jurisdiction over cases
    in which money damages are sought against a
    foreign state for personal injury or death that
    was caused by . . . extrajudicial killing . . . or
    the provision of material support or resources
    for such an act if such act or provision of
    material support or resources is engaged in by
    an official, employee, or agent of such foreign
    state while acting within the scope of his or her
    office, employment, or agency.
    Because this argument poses a challenge to the court’s
    subject matter jurisdiction, it was not forfeited by Sudan’s
    failure to appear in the district court. See Practical Concepts,
    
    811 F.2d at 1547
    . This is Sudan’s most sweeping challenge,
    and, if correct, then the claims of all the plaintiffs must fail. The
    district court rejected Sudan’s jurisdictional argument based
    20
    upon the plain meaning of “extrajudicial killing.” Owens V,
    174 F. Supp. 3d at 259-66. Reviewing de novo this question of
    law relating to our jurisdiction, we agree that “extrajudicial
    killings” include the terrorist bombings that gave rise to these
    cases.
    Section 1605A(h)(7) of the FSIA provides that the term
    “extrajudicial killing” has the meaning given to it in § 3(a) of
    the Torture Victim Protection Act of 1991, which defines an
    extrajudicial killing as:
    a deliberated killing not authorized by a
    previous judgment pronounced by a regularly
    constituted court affording all the judicial
    guarantees which are recognized as
    indispensable by civilized peoples. Such term,
    however, does not include any such killing that,
    under international law, is lawfully carried out
    under the authority of a foreign nation.
    Pub. L. No. 102-256, § 3(a), 
    106 Stat. 73
    , 73 (1991) (codified
    at 
    28 U.S.C. § 1350
     note) (hereinafter TVPA).
    On its face, this definition contains three elements: (1) a
    killing; (2) that is deliberated; and (3) is not authorized by a
    previous judgment pronounced by a regularly constituted
    court. The 1998 embassy bombings meet all three requirements
    and do not fall within the exception for killings carried out
    under the authority of a foreign nation acting in accord with
    international law. First, the bombings caused the death of more
    than 200 people in Kenya and Tanzania. The bombings were
    “deliberated” in that they involved substantial preparation,
    meticulous timing, and coordination across multiple countries
    in the region. See Mamani v. Berzain, 
    654 F.3d 1148
    , 1155
    (11th Cir. 2011) (defining “deliberated” under the TVPA as
    21
    “being undertaken with studied consideration and purpose”).
    Finally, the bombings themselves were neither authorized by
    any court nor by the law of nations. Therefore, on its face, the
    FSIA would appear to cover the bombings as extrajudicial
    killings.
    Sudan offers a host of reasons we should ignore the plain
    meaning of “extrajudicial killing” in the TVPA and exclude
    terrorist bombings like the 1998 embassy attacks from
    jurisdiction under the FSIA terrorism exception. Sudan’s
    arguments draw upon the text and structure, the purpose, and
    the legislative history of the TVPA and of the FSIA terrorism
    exception. Each of Sudan’s arguments shares the same basic
    premise: Only a state actor, not a nonstate terrorist, may
    commit an “extrajudicial killing.”
    A. Textual Arguments
    We begin, as we must, with the text of the statute. First,
    Sudan contends the text of the TVPA, and, by extension of the
    FSIA, defines an “extrajudicial killing” in terms of
    international law, specifically the Geneva Conventions.
    According to Sudan, international law generally and the
    Geneva Conventions specifically prohibit only killings carried
    out by a state actor. The plaintiffs vigorously contest both
    propositions.
    1. State action requirements under international law
    Sudan bases its argument that principles of international
    law supply the meaning of “extrajudicial killing” in the FSIA
    upon similarities between the TVPA and the prohibition on
    “summary executions” in Common Article 3 of the Geneva
    Conventions of 1949, which condemns “the passing of
    sentences and the carrying out of executions without previous
    22
    judgment pronounced by a regularly constituted court,
    affording all the judicial guarantees which are recognized as
    indispensable by civilized peoples.” Geneva Convention for
    the Amelioration of the Condition of the Wounded and Sick in
    Armed Forces in the Field, art. 3(1)(d), Aug. 12, 1949, 6 U.S.T.
    3114, 75 U.S.T.S. 85. The similarities between the two
    definitions, Sudan contends, shows the Congress intended to
    define an “extrajudicial killing” in the TVPA with reference to
    principles of international law adopted in the Geneva
    Conventions.
    To Sudan, this is of critical importance because the
    Geneva Conventions and international law, it argues, proscribe
    killings only when committed by a state agent, not when
    perpetrated by a nonstate actor. Three pieces of evidence are
    said to demonstrate this limitation. First, Sudan notes, the
    United Nations adopted a resolution in 1980 condemning as
    inconsistent with international law “[e]xtra-legal executions”
    carried out by “armed forces, law enforcement or other
    governmental agencies.” Congress on the Prevention of Crime
    and the Treatment of Offenders Res., A/Conf.87/L.11 (Sep. 5,
    1980). Second, Sudan cites a United Nations annual report, S.
    Amos Wako (Special Rapporteur on Extrajudicial, Summary
    or Arbitrary Executions), Summary or Arbitrary Executions,
    ¶¶ 74-85, U.N. Doc. E/CN.4/1983/16 (Jan. 31, 1983), which
    describes “extralegal executions” and “summary executions”
    in terms suggesting state involvement. And third, Sudan
    references an online database of the United Nations, which
    links the term “extrajudicial killing” to the definition of “extra-
    legal      execution.”    U.N.       Terminology         Database,
    http://untermportal.un.org/UNTERM/display/Record/UNHQ/
    extra-legal_execution/c253667 (last visited July 19, 2017).
    Each of these references to international law is both
    inapposite and rebutted by the plaintiffs. If Sudan means to say
    23
    the TVPA incorporates the prohibition against a “summary
    execution” in the Geneva Conventions, then it must show what
    was meant by that term in the Geneva Conventions themselves.
    In doing so, however, Sudan principally relies upon U.N.
    documents published more than a quarter century after the
    ratification of the Geneva Conventions in 1949, rather than the
    deliberations over the proposed Conventions, which Sudan
    does not cite at all. Odder still, none of these documents (or the
    terminology database) actually says the Geneva Conventions
    proscribe only “summary executions” committed by a state
    actor. See Summary or Arbitrary Executions, supra p. 22,
    ¶¶ 35-36 (noting Article 3 of the Geneva Conventions prohibits
    “murder” in general and “also specifically prohibits the passing
    of sentences and the carrying out of executions without
    previous judgement pronounced by a regularly constituted
    court”). Indeed, the plaintiffs present reasons to doubt whether
    the Geneva Conventions in specific, or international law in
    general, prohibit only killings by a state actor. As the plaintiffs
    note, Article 3 of the First Convention prohibits “violence to
    life and person, in particular murder of all kinds.” Geneva
    Convention, art. 3(1)(a), Aug. 12, 1949, 6 U.S.T. 3114, 75
    U.S.T.S. 85. Likewise, the U.N. Terminology Database lists
    “[k]illings committed by vigilante groups” as an example of an
    “extrajudicial killing.” And finally, a “Handbook” published
    by the U.N. Special Rapporteur on Summary or Arbitrary
    Executions contains a full chapter on “killings by non-state
    actors and affirmative state obligations,” which states that
    “Human rights and humanitarian law clearly apply to killings
    by non-State actors in certain circumstances.” Project on
    Extrajudicial Executions, UN Special Rapporteur on
    Extrajudicial          Executions          Handbook,         ¶ 45,
    http://www.extrajudicialexecutions.org/application/media/Ha
    ndbook%20Chapter%203-Responsibility%20of%20states%20
    for%20non-state%20killings.pdf (last visited July 19, 2017).
    24
    This does not mean Sudan’s interpretation of international
    law as it pertains to summary executions (as opposed to
    extrajudicial killings) is wrong or that direct state involvement
    is not needed for certain violations of international law. Rather,
    the point is that the role of the state in an extrajudicial killing
    appears less clear under international law than Sudan would
    have us believe; indeed it appears less clear than the definition
    of an “extrajudicial killing” in the TVPA itself. Accordingly,
    we doubt the Congress intended categorically to preclude state
    liability for killings by nonstate actors by adopting a definition
    of “extrajudicial killing” similar to that of a “summary
    execution” in the Geneva Conventions.
    2. International law and the TVPA
    More important, even if Sudan’s interpretation of the
    Geneva Conventions and international law is correct, its
    argument would fail because the TVPA does not appear to
    define an “extrajudicial killing” coextensive with the meaning
    of a “summary execution” (or any similar prohibition) under
    international law. For example, the TVPA does not adopt the
    phrasing of the Geneva Conventions wholesale. Rather, as the
    plaintiffs point out, the TVPA substitutes the term “deliberated
    killing” for “the passing of sentences and the carrying out of
    executions” in the Geneva Conventions. While “the passing of
    sentences and the carrying out of executions” strongly suggests
    at least some level of state involvement, a nonstate party may
    commit a “deliberated killing” as readily as a state actor.
    Indeed, several other statutes contemplate “deliberate” attacks
    by nonstate entities, including terrorist groups. See, e.g., 
    6 U.S.C. § 1169
    (a) (requiring the Secretary of Transportation to
    assess vulnerability of hazardous materials in transit to a
    “deliberate terrorist attack”); 
    42 U.S.C. § 16276
     (mandating
    research on technologies for increasing “the security of nuclear
    facilities from deliberate attacks”). Due to the substitution of
    25
    “deliberated” killings for “the passing of sentences and the
    carrying out of executions,” the inference of direct state
    involvement is much less strong in the TVPA than in the
    Geneva Conventions. The difference between the definition in
    the TVPA and the prohibition in the Geneva Conventions also
    signals the Congress intended the TVPA to reach a broader
    range of conduct than just “summary executions.” For the court
    to rely upon the narrower prohibition in the Geneva
    Conventions would contravene the plain text of the TVPA,
    which is, after all, the sole “authoritative statement” of the law.
    See Exxon Mobil Corp. v. Allapattah Servs., Inc., 
    545 U.S. 546
    ,
    568 (2005).
    Resisting this conclusion, Sudan points to two phrases
    that, it contends, impose a state actor requirement upon the
    definition of an extrajudicial killing in the TVPA. First, Sudan
    notes that an extrajudicial killing must not be one “authorized
    by a previous judgment pronounced by a regularly constituted
    court.” As Sudan would have it, the “only killings that can be
    reasonably be imagined to be authorized by a ‘previous
    judgment’ are those by state actors.” Regardless whether Sudan
    is right on this point, the argument does not imply what Sudan
    intends. If only a state actor may lawfully kill based upon a
    “previous judgment,” then all killings committed by a nonstate
    actor are, by definition, not “authorized by a previous
    judgment.” Therefore, only a killing committed by a state actor
    might not be an “extrajudicial killing,” that is, if it was
    “authorized by a previous judgment pronounced by a regularly
    constituted court.” Accepting Sudan’s premise, no other
    outcome can “reasonably be imagined.”
    Similarly, Sudan argues the second sentence in the
    definition of an “extrajudicial killing” in the TVPA anchors the
    meaning of the first sentence in international law which, in
    Sudan’s view, prohibits only summary executions by state
    26
    actors. Even accepting Sudan’s view of international law, we
    are not persuaded. In the first sentence of § 3(a), the Congress
    defined the proscribed conduct (i.e., a “deliberated killing”) in
    terms that extended beyond the prohibition on a “summary
    execution” under international law. The second sentence
    excludes from the definition of “extrajudicial killing” “any . . .
    killing that, under international law, is lawfully carried out
    under the authority of a foreign nation.” This ensured that the
    more expansive prohibition of the first sentence would not
    reach the traditional prerogatives of a sovereign nation. Were
    “extrajudicial killings” no broader than “summary executions,”
    the limitation in international law of what constitutes an
    “extrajudicial killing” would be unnecessary because, by
    Sudan’s own argument, a “summary execution” always
    violates international law. Therefore, Sudan’s interpretation
    would make superfluous the reference to killings “lawfully
    carried out” “under international law,” contrary to the “cardinal
    principle of statutory construction that we must give effect, if
    possible, to every clause and word of a statute.” See Williams
    v. Taylor, 
    529 U.S. 362
    , 404 (2000) (internal quotation marks
    and citation omitted).
    Moreover, the reference to international law in the second
    sentence of § 3(a) of the TVPA highlights its omission in the
    first sentence. Had the Congress intended the definition of an
    “extrajudicial killing” to track precisely with that of a
    “summary execution” under international law, § 3(a) could
    have expressly referenced international law in both the
    prohibition and its limitation. That approach is found elsewhere
    in the FSIA, see 
    28 U.S.C. § 1605
    (a)(3) (authorizing
    jurisdiction where “rights in property [are] taken in violation of
    international law”), as well as in other statutes, see 
    18 U.S.C. § 1651
     (proscribing “the crime of piracy as defined by the law
    of nations”). Indeed, the Congress specifically defined other
    predicate acts in § 1605A by reference to international treaties,
    27
    see 28 U.S.C. § 1605A(h)(1),(2) (defining “aircraft sabotage”
    and “hostage taking” with reference to international treaties),
    but referenced only a U.S. statute, the TVPA, in its definition
    of “extrajudicial killing.” That the Congress incorporated
    international law expressly into other jurisdictional provisions
    undermines the inference that it intended implicitly to do so
    here. See Dep’t of Homeland Sec. v. MacLean, 
    135 S. Ct. 913
    ,
    919 (2015) (“Congress generally acts intentionally when it uses
    particular language in one section of a statute but omits it in
    another”).
    3. State action requirements in the TVPA and the
    FSIA terrorism exception
    The plaintiffs provide another persuasive reason Sudan’s
    textual arguments are flawed. The TVPA authorizes an action
    only for harms arising from the conduct of a state actor. See
    TVPA § 2(a) (providing a cause of action against an
    “individual who, under actual or apparent authority, or color of
    law, of any foreign nation” engages in torture or extrajudicial
    killing). Sudan argues the state actor requirement for a suit
    under the TVPA is “necessarily incorporated” in § 3(a) and
    therefore applies to those actions arising from “extrajudicial
    killings” under the FSIA. The limitation of actions to state
    actors, however, is found not in § 3(a) but in § 2(a) of the
    TVPA. As the plaintiffs note, when passing the current and
    prior FSIA terrorism exceptions, the Congress each time
    incorporated the section of the TVPA that defined an
    “extrajudicial killing” but not the section that limited the cause
    of action under the TVPA to state actors. If the Congress had
    wanted to limit extrajudicial killings to state actors, then it
    could have incorporated both sections of the TVPA into the
    FSIA terrorism exception. That it did not compels us to
    conclude the state actor limitation in the TVPA does not
    transfer to the definition of an “extrajudicial killing” in the
    28
    FSIA. Cf. Sebelius v. Cloer, 
    133 S. Ct. 1886
    , 1894 (2013)
    (declining to apply limitations from one section of a statue
    when the text of another section does not cross-reference the
    first section).
    Indeed, the reason the Congress declined to incorporate the
    state-actor limitation in the TVPA is plain on the face of the
    FSIA terrorism exception. As the plaintiffs observe, the TVPA
    and the FSIA share a similar structure. Each statute defines the
    predicate acts that give rise to liability in one section – TVPA
    § 3 and FSIA § 1605A(h) – and then limits who may be
    subjected to liability in another – TVPA § 2 and FSIA
    §§ 1605A(a)(1) and (c). Both statutes also require a plaintiff to
    show a certain type of nexus to a foreign sovereign. In the
    TVPA, a state official must act “under actual or apparent
    authority, or color of law” of a foreign sovereign. In the FSIA,
    liability arises when the state official, employee, or agent
    acting within the scope of his authority either directly commits
    a predicate act or provides “material support or resources” for
    another to commit that act. If the more stringent state-actor
    limitation in the TVPA traveled with the definition of an
    “extrajudicial killing” in that statute, then it would all but
    eliminate the “material support” provision of § 1605A(a), at
    least with respect to extrajudicial killings. For example,
    § 1605A(a) would extend jurisdiction over a sovereign that did
    not directly commit an extrajudicial killing only if an official
    of the defendant state materially supported a killing committed
    by a state actor from a different state. We seriously doubt the
    Congress intended the exception to immunity for materially
    supporting an extrajudicial killing to be so narrow.
    Sudan attempts to avoid the conclusion that the FSIA does
    not adopt the state-actor limitation in the TVPA in two ways.
    First, Sudan contends the introductory clause of § 3(a)
    implicitly incorporates the state actor limitation of § 2(a). This
    29
    clause states that an “extrajudicial killing” is defined “[f]or the
    purposes of this Act.” That supposedly indicates the Congress
    intended to import the state actor limitation of § 2(a) into the
    definition of an extrajudicial killing in § 3(a). But Sudan’s
    reading of this phrase leads to an illogical conclusion. A
    statutory definition made expressly “[f]or the purposes of this
    Act” informs our understanding of the entire statute. In other
    words, the definitions in TVPA § 3 govern the use of those
    defined terms elsewhere in the Act. Under Sudan’s
    interpretation, however, the reverse would occur: in order to
    understand the meaning of a defined term, we would have to
    look to the remainder of the statute, and not to the definition
    itself. What then, we wonder, would the definition contribute
    to the statute? Would it be wholly redundant, a conclusion that
    conflicts with our usual interpretive presumptions? See Nat’l
    Ass’n of Home Builders v. Defs. of Wildlife, 
    551 U.S. 644
    , 669
    (2007). Or, if not redundant, how would a court then apply the
    definition to terms used in the remainder of the statute if the
    remainder of the statute, in turn, gave meaning to the
    definition? Given these paradoxes, the phrase “[f]or the
    purposes of this Act” cannot mean what Sudan contends.
    Instead, that phrase simply means that the definition of an
    “extrajudicial killing” in TVPA § 3(a) informs the remainder
    of the TVPA (and, by extension, the FSIA), and not the reverse.
    Second, Sudan contends the definition of an “extrajudicial
    killing” in the TVPA implicitly incorporates international law
    (and the supposed state-actor limitation therein) even without
    reference to the state-actor limitation in § 2(a). Here Sudan
    relies principally upon a dictum in a Second Circuit opinion
    discussing the TVPA in a case arising under the Alien Tort
    Claims Act (ATCA), which expressly incorporates
    international law: “torture and summary execution – when not
    perpetrated in the course of genocide or war crimes – are
    proscribed by international law only when committed by state
    30
    officials or under color of law.” Kadić v. Karadžić, 
    70 F.3d 232
    , 243 (1995). The court further noted that “official torture
    is prohibited by universally accepted norms of international
    law, and the Torture Victim Act confirms this holding and
    extends it to cover summary execution.” 
    Id. at 244
     (citation
    omitted). This, Sudan contends, shows the TVPA definition of
    an “extrajudicial killing” (and not just the TVPA in general)
    draws upon international law. The court’s discussion in that
    case, however, relied not only upon the definition of an
    “extrajudicial killing” in TVPA § 3(a) but also upon the
    limitation of the cause of action to state actors in TVPA § 2(a).
    Id. at 243. Indeed, the court later separately summarized the
    two provisions of the TVPA, distinguishing § 2(a), which
    “provides a cause of action” against an individual acting under
    state authority, from § 3, which “defines the terms
    ‘extrajudicial killing’ and ‘torture.’” Id. at 245.
    Sudan’s argument that the definitions in the TVPA
    incorporate international law is flawed as a matter of statutory
    interpretation. If the definition of an “extrajudicial killing” (and
    “torture”) in TVPA § 3(a) already had a state actor limitation
    from international law, then the additional state actor limitation
    in § 2(a) would be surplusage. See Gustafson v. Alloyd Co., 
    513 U.S. 561
    , 574 (1995) (instructing courts in interpreting a statute
    to “avoid a reading which renders some words altogether
    redundant”). That the Congress included § 2(a) in the TVPA
    therefore implies either that the definition of extrajudicial
    killing in § 3(a) of the FSIA does not incorporate international
    law or that international law contains no state actor limitation.
    Either way, Sudan is out of luck.
    In sum, Sudan’s textual arguments that an extrajudicial
    killing requires a state actor all fail. Even if international law
    contained such a limitation – a proposition we doubt but do not
    decide – the TVPA does not incorporate international law (or
    31
    any limitations therein) into its definition of an “extrajudicial
    killing.” Because the FSIA terrorism exception references only
    the definitions in TVPA § 3, and not the limitation to state
    actors in TVPA § 2(a), nothing in the text of the FSIA makes a
    state actor a prerequisite to an extrajudicial killing.
    B. Statutory Purpose
    Without a viable textual basis for its position, Sudan
    argues the purpose of the TVPA and the FSIA extend only to
    an “extrajudicial killing” committed by a state actor. Even if
    we could ignore the statutory text in pursuit of its supposed
    purpose, Sudan’s arguments from the purpose of the statutes
    would still not be convincing.
    With respect to the purpose of the TVPA, Sudan pursues a
    line of reasoning parallel to that of its textual arguments:
    Because the TVPA was intended to “carry out obligations of
    the United States under the United Nations Charter and other
    international agreements . . . by establishing a civil action for
    recovery of damages from an individual who engages in torture
    or extrajudicial killing,” Pub. L. No. 102-256, 106 Stat. at 73
    (preamble), Sudan contends the supposed state-actor
    requirement for a killing to violate international law also limits
    the definition of an “extrajudicial killing” in the TVPA and
    hence the jurisdictional requirements of the FSIA. Even if
    international law both motivated enactment of the TVPA and
    limits extrajudicial killing to a killing by state actor, Sudan’s
    argument about the purpose of the TVPA still would fail. The
    TVPA may well be intended to carry out certain international
    obligations, but this purpose is reflected in the TVPA as a
    whole, not in each individual provision viewed in isolation.
    One would struggle to find a distinct purpose in the definition
    section of the TVPA, which neither creates rights nor imposes
    duties, divorced from the broader statute. When one statute,
    32
    such as the FSIA, incorporates a definition from another
    statute, here the TVPA, it imports only the specified definition
    and not the broader purpose of the statute from which it comes.
    In any event, the different purposes of the TVPA and the
    FSIA are plain on the face of those statutes. The TVPA targets
    individual state officials for their personal misconduct in
    office, while the terrorism exception to the FSIA targets
    sovereign nations in an effort to deter them from engaging,
    either directly or indirectly, in terrorist acts.
    Sudan’s own arguments tacitly admit the FSIA serves a
    different purpose than the TVPA, but it again frames this
    purpose in terms of international law. To Sudan, the FSIA
    serves to withdraw sovereign immunity only for “certain
    universally defined and condemned acts” that are “firmly
    grounded in international law.” Once again Sudan contends,
    this excludes killings committed by nonstate terrorists because
    international law proscribes killings only when committed by
    a state actor. Furthermore, § 1605A, Sudan contends, should be
    read to exclude acts of terrorism because terrorism lacks
    “universal condemnation, or even [an] accepted definition . . .
    under international law.” Other predicate acts included in
    § 1605A, particularly aircraft sabotage and hostage taking, are
    inconsistent with this reading of the FSIA. As the plaintiffs and
    the district court recognized, “[f]or the past fifteen years it has
    been hard to think of a more quintessential act of terrorism than
    the purposeful destruction of a passenger aircraft in flight – yet
    such an act is manifestly covered by § 1605A.” Owens V, 174
    F. Supp. 3d at 264. Indeed, both aircraft sabotage and hostage
    taking are more often committed by a nonstate terrorist than by
    a state actor, and both often result in extrajudicial killings.
    Moreover, the definitions of these acts in the FSIA clearly do
    not require state action. 28 U.S.C. §§ 1605A(h)(1) (referencing
    the Convention for the Suppression of Unlawful Acts Against
    33
    the Safety of Civil Aviation, art. 1, Sept. 23, 1971, 24 U.S.T.
    564, 974 U.N.T.S. 177 (proscribing aircraft sabotage
    committed by “[a]ny person”)); 1605A(h)(2) (referencing the
    International Convention Against the Taking of Hostages, art.
    1, Dec. 17, 1979, 1316 U.N.T.S. 205 (proscribing hostage
    taking by “[a]ny person”)). It would be more than odd if a
    provision designed to sanction acts “firmly grounded in
    international law” – but not international terrorism – included
    only acts synonymous with international terrorism while
    excluding other violations of international law, such as
    genocide, not closely associated with terrorist groups. Against
    this backdrop, it also strains belief that the Congress would
    assert jurisdiction over claims against a state that materially
    supports nonstate terrorists who kill via aircraft sabotage or
    hostage taking, yet deny jurisdiction for similarly supported
    killings caused by a truck bombing or a kidnapping. It is far
    more likely the Congress intended to penalize a state’s
    provision of material support for terrorist killings in general,
    rather than to codify broad principles of international law or to
    regulate the specific way state-supported terrorists go about
    their horrific deeds. Were the law otherwise, designated state
    sponsors of terrorism could effectively contract out certain
    terrorist acts and avoid liability under the FSIA.
    As the district court correctly recognized, § 1605A strives
    to hold designated state sponsors of terrorism accountable for
    their sponsorship of terror, regardless whether they commit
    atrocities themselves or aid others in doing so. Owens V, 174
    F. Supp. 3d at 262. Therefore, the purpose of the statute clearly
    embraces liability for the embassy bombings here in question.
    C. Statutory History
    Sudan next resorts to the legislative history of the FSIA
    and the TVPA to explain why an “extrajudicial killing”
    34
    requires state involvement. The short answer to its long and
    winding argument through the characteristically inconclusive
    background materials is that when the meaning of a statute is
    clear enough on its face, “reliance on legislative history is
    unnecessary.” See Mohamad v. Palestinian Auth., 
    132 S. Ct. 1702
    , 1709 (2012) (citation omitted).
    Subsequent legislation, on the other hand, because it is
    enacted and not just compiled, may inform our understanding
    of a prior enactment with which it should be read in harmony.
    In this instance, the Congress made clear that an extrajudicial
    killing includes a terrorist bombing when, in 1996, it enacted
    the Flatow Amendment to the FSIA to provide a federal cause
    of action against state officials who had committed or
    materially supported one of the predicate acts listed in
    § 1605(a)(7), including an extrajudicial killing. See Pub. L. No.
    104-208, § 589, 110 Stat. at 3009-172. The Flatow Amendment
    responded to a suicide bombing in Israel, carried out by a
    nonstate terrorist group supported by Iran; it aimed to deter
    terrorism by making officials of states that sponsor terrorism
    liable for punitive damages. We do not believe the Congress
    would provide a cause of action aimed at killings over which it
    had not authorized jurisdiction.
    Subsequent events in the Flatow saga reinforce this
    conclusion. Immediately following passage, relatives of the
    victim sued Iran under the Amendment, and the district court
    asserted jurisdiction based upon this “extrajudicial killing.”
    Flatow, 999 F. Supp. at 18. The plaintiffs won a default
    judgment but could not collect due to Iran’s lack of attachable
    assets. In 2000 the Congress again responded, passing a
    compensation scheme to pay individuals who “held a final
    judgment for a claim or claims brought under section
    1605(a)(7) of title 28,” including the Flatows. See Victims of
    Trafficking and Violence Protection Act of 2000, Pub. L. No.
    35
    106-386, § 2002(a)(2)(A), 
    114 Stat. 1464
    , 1541-43
    (authorizing payment to claimants with judgments against Iran,
    which included the Flatows); H.R. REP. NO. 106-939, at 116
    (2000). This legislation too would make little sense if the
    judgments themselves were void because no extrajudicial
    killing had occurred.
    Finally, after courts had applied the FSIA terrorism
    exception to terrorist bombings for over a decade, 2 the
    Congress reenacted the same predicate acts in § 1605(a)(7)
    when authorizing the new FSIA exception under § 1605A. The
    Congress thereby ratified the Flatow court’s understanding –
    and those of every other court since then – that a nonstate actor
    may commit an extrajudicial killing. See Lorillard v. Pons, 
    434 U.S. 575
    , 580 (1978) (“Congress is presumed to be aware of an
    administrative or judicial interpretation of a statute and to adopt
    2
    See, e.g., Salazar v. Islamic Republic of Iran, 
    370 F. Supp. 2d 105
    , 113 (D.D.C. 2005) (applying the terrorism exception
    to the U.S. embassy bombing in Beirut); Peterson v. Islamic
    Republic of Iran, 
    264 F. Supp. 2d 46
    , 61 (D.D.C. 2003) (U.S.
    Marine barracks in Beirut), approved of by 
    627 F.3d 1117
    ,
    1122-23 (9th Cir. 2010); Wagner v. Islamic Republic of Iran,
    
    172 F. Supp. 2d 128
    , 133 (D.D.C. 2001) (U.S. embassy annex
    in East Beirut); Ben-Rafael v. Islamic Republic of Iran, 
    540 F. Supp. 2d 39
    , 53 (D.D.C. 2008) (Israeli embassy in Buenos
    Aires); Blais v. Islamic Republic of Iran, 
    459 F. Supp. 2d 40
    ,
    53 (D.D.C. 2006) (Khobar Towers military residence in Saudi
    Arabia); Rux v. Republic of Sudan, No. 2:04-cv-428, 
    2005 WL 2086202
    , at *13 (E.D. Va. Aug. 26, 2005) (USS Cole),
    aff’d in relevant part, 
    461 F.3d 461
     (4th Cir. 2006); see also
    Owens II, 
    412 F. Supp. 2d at
    106 n.11 (“[T]he Sudan
    defendants do not dispute that the embassy bombings
    constitute an act of extrajudicial killing”), aff'd, 
    531 F.3d 884
    .
    36
    that interpretation when it re-enacts a statute without change”).
    Now, after more than two decades of consistent judicial
    application of the FSIA, narrowing the term “extrajudicial
    killing” to include only killings committed by a state actor
    would contravene the Congress’s revealed intent in repeatedly
    authorizing judicial remedies for victims of terrorist bombings.
    To summarize, the plain meaning of § 1605A(a) grants the
    courts jurisdiction over claims against designated state
    sponsors of terrorism that materially support extrajudicial
    killings committed by nonstate actors. Contrary to Sudan’s
    contention, the purpose and statutory history of the FSIA
    terrorism exception confirm this conclusion. Therefore, this
    court may assert jurisdiction over claims arising from al
    Qaeda’s bombing of the U.S. embassies in 1998 if the plaintiffs
    have adequately demonstrated Sudan’s material support for
    those bombings.
    III.   Sufficiency of the Evidence Supporting Jurisdiction
    Sudan’s weightiest challenge to jurisdiction relates to the
    admissibility and sufficiency of the evidence that supported the
    district court’s finding of jurisdiction. As discussed above,
    § 1605A(a)(1) of the FSIA grants jurisdiction and withdraws
    immunity for claims “caused by an act of . . . extrajudicial
    killing . . . or the provision of material support or resources for
    such an act.”
    In order to establish the court’s jurisdiction, the plaintiffs
    in this case must show (1) Sudan provided material support to
    al Qaeda and (2) its material support was a legally sufficient
    cause of the embassy bombings. See Kilburn v. Socialist
    People’s Libyan Arab Jamahiriya, 
    376 F.3d 1123
    , 1127 (D.C.
    Cir. 2004) (treating causation as a jurisdictional requirement).
    Sudan challenges the district court’s factual findings on both
    37
    accounts. Because the elements of material support and
    causation are jurisdictional, Sudan may contest them on appeal
    even though it forfeited its right to contest the merits of the
    plaintiffs’ claims. See Practical Concepts, 
    811 F.2d at 1547
    .
    This does not mean, however, that the plaintiffs on appeal must
    offer the same quantum of evidence needed to show liability in
    the first instance. Establishing material support and causation
    for jurisdictional purposes is a lighter burden than proving a
    winning case on the merits. See Agudas Chasidei Chabad of
    U.S. v. Russian Federation, 
    528 F.3d 934
    , 940 (D.C. Cir.
    2008).
    In its opinion rejecting Sudan’s motion to vacate the
    default judgments, the district court identified two bases upon
    which the plaintiffs established material support and causation
    for the purpose of jurisdiction. For plaintiffs proceeding under
    the federal cause of action in § 1605A(c), the court – following
    then-binding Circuit precedent – held the plaintiffs had
    established jurisdiction by making a “non-frivolous” claim that
    Sudan materially supported al Qaeda and that such support
    proximately caused their injuries. Owens V, 174 F. Supp. 3d at
    272-75. Since that decision, the Supreme Court has overruled
    the precedent upon which the district court relied, requiring a
    plaintiff to prove the facts supporting the court’s jurisdiction
    under the FSIA, rather than simply to make a “non-frivolous”
    claim to that effect. Bolivarian Republic of Venezuela v.
    Helmerich & Payne Int’l Drilling Co., 
    137 S. Ct. 1312
    , 1316
    (2017). The Court’s decision eliminates the first basis for the
    district court’s jurisdictional holding.
    The decision in Helmerich, however, left intact the district
    court’s second basis for concluding the plaintiffs had
    sufficiently shown material support and causation in this case.
    For reasons no longer relevant, the district court concluded that
    plaintiffs who are ineligible to use the federal cause of action
    38
    in § 1605A(c) – namely, victims or claimants who were not
    U.S. nationals, military service members, or government
    employees or contractors – could not establish jurisdiction
    simply by making a non-frivolous claim of material support
    and causation. Owens V, 174 F. Supp. 3d at 275. Consequently,
    the court required those plaintiffs to offer evidence proving
    these jurisdictional elements. Id. First in its 2011 opinion on
    liability and again in its 2016 opinion denying vacatur, the
    district court weighed the plaintiffs’ evidence of material
    support and causation and concluded it satisfied the
    jurisdictional standard. Owens V, 174 F. Supp. 3d at 276;
    Owens IV, 
    826 F. Supp. 2d at 150-51
    . Because the court’s
    finding of Sudan’s material support for the 1998 embassy
    bombings plainly applies to all claimants and all claims before
    this court, Sudan can prevail in its challenge to material support
    and causation only if the district court erred in its factual
    findings of jurisdiction. We conclude it did not.
    In each of the cases, the plaintiffs’ evidence was received
    at the three-day evidentiary hearing held by the district court in
    October 2010. The court held that hearing to satisfy the FSIA
    requirement that, in order to secure a default judgment, a
    claimant must “establish[] his claim or right to relief by
    evidence satisfactory to the court.” 
    28 U.S.C. § 1608
    (e). At the
    hearing, the court received evidence of both Iran’s and Sudan’s
    support for al Qaeda in advance of the embassy bombings, but
    we limit our discussion here to the evidence pertaining to
    Sudan.
    In evaluating Sudan’s evidentiary arguments, we proceed
    in three steps. First, we summarize the proceedings at the 2010
    evidentiary hearing and the facts presented by the plaintiffs and
    their expert witnesses. Then we consider Sudan’s two
    challenges to this evidence. In the first, Sudan argues the
    district court relied upon inadmissible evidence to conclude
    39
    that it materially supported al Qaeda. In the second, Sudan
    contends that, even if admissible, the evidence presented could
    not establish material support and causation as a matter of law.
    A. The Evidentiary Hearing
    At the October 2010 evidentiary hearing the plaintiffs
    presented evidence from a variety of sources. Reviewing this
    evidence as a whole, the district court concluded it sufficed
    both to establish jurisdiction and to prove Sudan’s liability on
    the merits. We first describe the sources of evidence the court
    received and then briefly summarize the factual findings the
    court drew from this evidence.
    1. The sources of evidence presented
    As is apparent from the opinions of the district court, the
    testimony of expert witnesses and al Qaeda operatives was of
    critical importance to its factual findings. For this reason, we
    discuss the experts’ and operatives’ testimony first and in
    greatest detail. The plaintiffs produced three expert witnesses
    and prior recorded testimony from three former members of al
    Qaeda.
    First, the plaintiffs called terrorism consultant Evan
    Kohlmann to testify about the relationship between Sudan and
    al Qaeda in the 1990s. Kohlmann advised government and
    private clients on terrorist financing, recruitment, and history.
    He has authored a book and several articles on terrorism and
    has testified as an expert in multiple criminal trials. Kohlmann
    based his opinions regarding Sudan’s support for al Qaeda
    upon a review of secondary source materials, including but not
    limited to the exhibits introduced at the hearing, testimony
    from criminal trials, and firsthand interviews he conducted
    with al Qaeda affiliates over the past decade. Kohlmann
    40
    testified that this information was of the type routinely relied
    upon by experts in the counterterrorism field.
    Next, the court received a written expert report from Dr.
    Lorenzo Vidino on “Sudan’s State Sponsorship of al Qaeda.”
    Dr. Vidino was a fellow at the Belfer Center for Science and
    International Affairs, Kennedy School of Government, at
    Harvard University. Like Kohlmann, Vidino has authored
    books and articles on terrorism and has previously testified in
    federal court on Sudan’s support for al Qaeda. Vidino based his
    report upon open source materials initially gathered around
    2004, which he reviewed and updated for the present case.
    The district court also received live testimony and a
    written report from Steven Simon, a security consultant and
    Special Advisor for Combatting Terrorism at the Department
    of State. From 1995 to 1999, during which time al Qaeda
    bombed the embassies, Simon served on the National Security
    Council (NSC) as Senior Director for Transnational Threats.
    His responsibilities at the NSC included directing
    counterterrorism policy and operations on behalf of the White
    House. After his government service, Simon published a book
    and several articles on international terrorism and taught
    graduate courses on counterterrorism.
    The court also heard recorded trial testimony from three
    former al Qaeda operatives. In particular, the plaintiffs’ star
    witness, Jamal al Fadl, cast a long shadow over the
    proceedings. al Fadl was a Sudanese national and former senior
    al Qaeda operative turned FBI informant. Now in the witness
    protection program, in 2001 he testified at the criminal trial of
    Usama bin Laden and other terrorists arising from the African
    embassy bombings. Al Fadl was particularly well-suited to
    address the relationship between al Qaeda and the government
    of Sudan in the 1990s because he served then as a principal
    41
    liaison between the terrorist group and Sudanese intelligence.
    He had also been instrumental in facilitating al Qaeda’s
    relocation from Afghanistan to Sudan in 1991 and had assisted
    the group in acquiring properties there. Although al Fadl did
    not testify at the evidentiary hearing, his prior testimony
    provided much of the factual basis for the expert witnesses’
    opinions.
    The court also received transcripts of prior testimony from
    two other al Qaeda operatives: Essam al Ridi and L’Houssaine
    Kherchtou. Both al Ridi and Kherchtou were members of al
    Qaeda when the terrorist group was based in Sudan, and both
    testified at the bin Laden trial. They testified, based upon first-
    hand knowledge, about the Sudanese government and military
    facilitating al Qaeda’s movement throughout East Africa and
    protecting al Qaeda leadership. The plaintiffs also submitted a
    deposition from al Ridi prepared for the instant case.
    In addition to this witness testimony, the court viewed
    videos produced by al Qaeda describing its move to Sudan and
    its terrorist activities thereafter. And finally, the court
    considered reports from the U.S. Department of State and the
    Central Intelligence Agency describing Sudan’s relationship
    with al Qaeda in the 1990s. 3
    3
    Sudan did put some evidence into the record before absenting itself
    from the litigation. For its 2004 motion to dismiss, Sudan obtained
    statements disputing its support for the 1998 embassy bombings
    from Timothy Carney, the U.S. Ambassador to Sudan from 1995 to
    1997, and from John Cloonan, a FBI Special Agent charged with
    building the conspiracy case against Bin Laden during the 1990s.
    The plaintiffs moved for leave to depose Carney and Cloonan, but
    the FBI and the Department of State successfully opposed the
    motion, arguing the request did not comply with each agency’s so-
    called Touhy regulations for obtaining permission to solicit
    testimony from former government officials, see 
    22 C.F.R. §§ 172.1
    -
    42
    2. The district court’s findings of fact
    From the plaintiffs’ evidence, the district court found that
    Sudan had provided material support to al Qaeda and that such
    support caused the embassy bombings. This support was
    provided in several ways, which we recount in a much
    abbreviated form.
    First, the district court found Sudan provided al Qaeda a
    safe harbor from which it could direct its operations. Owens IV,
    
    826 F. Supp. 2d at 139-43
    . This began with the overthrow of
    the Sudanese government in 1989 by Omar al Bashir, leader of
    the Sudanese military, and Hassan al Turabi, head of the
    National Islamic Front (NIF), Sudan’s most powerful political
    party. Kohlmann and Simon testified that al Turabi initiated
    contact with al Qaeda and other extremist groups, encouraging
    them to relocate to Sudan. Al Bashir formalized this initial
    outreach with a 1991 letter of invitation to Usama bin Laden.
    According to all three experts, Sudan’s outreach to al Qaeda
    was part of a broader strategy of inviting radical Islamist
    172.9; 
    28 C.F.R. §§ 16.21-16.29
    . The agencies also noted that Sudan
    had not properly sought approval to take the declarations.
    Sudan then ceased participating in the litigation. Although
    Sudan does not now contend the declarations were admissible, see
    Owens V, 174 F. Supp. 3d at 276 n.16, at oral argument it complained
    the court unfairly considered the plaintiffs’ supposedly inadmissible
    evidence but not the Carney and Cloonan declarations. The matter
    stands precisely as the district court left it in 2005. Sudan likely
    violated the agencies’ Touhy regulations in obtaining the declarations
    in 2004. Allowing it to use the declarations on appeal, without
    affording the plaintiffs an opportunity to seek depositions from
    Carney and Cloonan in compliance with the regulations, would work
    a substantial injustice.
    43
    groups to establish bases of operations in the country, which is
    confirmed by the State Department Patterns of Global
    Terrorism reports. See U.S. DEP’T OF STATE, PATTERNS OF
    GLOBAL TERRORISM: 1991, at 3 (1991) (“The government
    reportedly has allowed terrorist groups to train on its territory
    and has offered Sudan as a sanctuary to terrorist
    organizations”). Sudan’s extensive ties to terrorist groups
    prompted the Department of State to designate Sudan as a state
    sponsor of terrorism in August 1993. U.S. DEP’T OF STATE,
    PATTERNS OF GLOBAL TERRORISM: 1993, at 25 (1994).
    In 1991 al Qaeda accepted Sudan’s invitation. According
    to Kohlmann and Simon, the invitation benefited both bin
    Laden and the Sudanese government. For bin Laden, it allowed
    al Qaeda to depart an increasingly unstable Afghanistan and
    relocate closer to its strategic interests in the Middle East. For
    Sudan, outreach to terrorist groups provided leverage against
    the government’s enemies at home and abroad and advanced al
    Turabi’s ideological ambition for Sudan to become “the new
    haven for Islamic revolutionary thought.” Sudan also viewed
    al Qaeda as a source of domestic investment as bin Laden was
    rumored to be extremely wealthy and was well-known as a
    financier of the mujahedeen insurgency in Afghanistan.
    Once bin Laden had determined Sudan was a trustworthy
    partner, al Qaeda moved its operations there. All three experts
    described al Qaeda purchasing several properties in Sudan,
    including a central office and a guesthouse in Khartoum, and
    starting terrorist training camps on farms throughout the
    country. Al Fadl personally participated in some of these
    transactions. For a time, according to Kohlmann, al Qaeda even
    shared offices with the al Turabi’s NIF party in Khartoum. The
    close relationship between al Qaeda and the Sudanese
    government continued throughout the early 1990s, according
    to Kohlmann and Vidino, even after bin Laden publicized his
    44
    intent to attack American interests in a series of fatwas and after
    al Qaeda members claimed responsibility for the killing of U.S.
    soldiers in Mogadishu, Somalia. For example, bin Laden
    appeared in multiple television broadcasts with al Bashir and
    al Turabi celebrating the completion of infrastructure projects
    financed, in part, by bin Laden. Sudanese intelligence officials
    also worked hand-in-glove with al Qaeda operatives to screen
    purported al Qaeda volunteers entering the country in order “to
    ensure that they were not seeking to infiltrate bin Laden’s
    organization on behalf of a foreign intelligence service.” Al
    Fadl personally took part in these efforts.
    Sudan also helped al Qaeda develop contacts with other
    terrorist organizations. In 1991 the NIF organized an
    unprecedented gathering of terrorist organizations from around
    the world in Khartoum at the Popular Arab and Islamic
    Congress. Several of these groups, including the Egyptian
    Islamic Jihad (EIJ), whose membership would later overlap
    with that of al Qaeda, and the Iranian-backed Hezbollah, which
    later provided training to al Qaeda operatives, also established
    bases in Sudan. According to Kohlmann and Simon, Sudanese
    intelligence actively assisted al Qaeda in forming contacts with
    these groups, allowing the nascent organization to acquire
    skills and to recruit members from the more experienced
    groups that it would later use with devastating effect.
    Although Sudan expelled bin Laden in 1996 under
    international pressure, Kohlmann, Vidino, and one other expert
    testified that some al Qaeda operatives remained in the country
    thereafter. They based this conclusion, in part, upon an
    unclassified report of the CIA, dated December 1998. A State
    Department report from 1998, published after the embassy
    bombings, reinforced the conclusion that “Sudan continued to
    serve as a meeting place, safe haven, and training hub for a
    number of international terrorist groups, particularly Usama
    45
    Bin Ladin’s al-Qaida organization.” U.S. DEP’T OF STATE,
    PATTERNS OF GLOBAL TERRORISM: 1998 (1999). Although
    expelling bin Laden was a “positive step[],” the CIA concluded
    Sudan continued to send “mixed signals about cutting its
    terrorist ties” after his expulsion but before the embassy
    bombings. CENT. INTEL. AGENCY, SUDAN: A PRIMER ON
    BILATERAL ISSUES WITH THE UNITED STATES, at 4 (May 12,
    1997). Notably, Sudan remains a designated state sponsor of
    terrorism today.
    The district court also found Sudan had provided financial,
    governmental, military, and intelligence support to al Qaeda.
    Owens IV, 
    826 F. Supp. 2d at 143-46
    . During its time in Sudan,
    al Qaeda operated several business and charities. All three
    experts explained that these enterprises provided legitimate
    employment for al Qaeda operatives as well as cover for the
    group’s illicit activities throughout the region. The Sudanese
    government actively promoted al Qaeda’s businesses in several
    ways. As described by al Fadl, Sudan partnered with al Qaeda-
    affiliated businesses in major infrastructure projects, allowing
    al Qaeda to gain access to and experience with explosives.
    Sudan also granted al Qaeda businesses “customs exemptions”
    and “tax privileges” which, according to Vidino, enabled al
    Qaeda nearly to monopolize the export of several agricultural
    products. Sudan offered al Qaeda the services of its banking
    system, which helped the organization in “laundering money
    and facilitating other financial transactions that stabilized and
    ultimately enlarged Bin Laden’s presence in the Sudan.”
    From the very beginning Sudan also aided al Qaeda’s
    movement throughout the region. Relying upon al Fadl’s
    testimony, Kohlmann testified that al Qaeda circulated copies
    of President al Bashir’s letter of invitation among its
    operatives. Al Qaeda agents could present these copies to
    Sudanese officials in order to “avoid having to go through
    46
    normal immigration and customs controls” and to head off any
    “problems with the local police or authorities.” According to
    Kohlmann, Sudanese intelligence also transported weapons
    and equipment for al Qaeda from Afghanistan to Sudan via the
    state-owned Sudan Airways. On at least one occasion, Sudan
    allowed al Qaeda operative Kherchtou to smuggle $10,000 in
    currency – an amount above that permitted by law – to an al
    Qaeda cell in Kenya. This Kenyan cell ultimately carried out
    the bombing of the U.S. embassy in Nairobi in 1998.
    In addition to aiding al Qaeda’s movements directly, all
    three experts testified that the government provided al Qaeda
    members hundreds of passports and Sudanese citizenship. Al
    Qaeda operatives needed these passports because they were “de
    facto stateless individuals” who could no longer safely travel
    on passports from their countries of origin. Upon returning
    from abroad, Sudanese officials allowed al Qaeda operatives to
    bypass customs and immigration controls. As al Fadl testified,
    this allowed militants to avoid having their passport stamped
    by a nation that had come under increasing scrutiny for its ties
    to terrorist organizations.
    Finally, the district court identified several instances in
    which Sudan provided security to al Qaeda leadership. Owens
    IV, 
    826 F. Supp. 2d at 145
    . In his prior testimony, al Fadl
    recounted an occasion when Sudanese intelligence intervened
    to prevent the arrest of al Qaeda operatives by local police. Al
    Ridi also testified that Sudan assigned 15 to 20 uniformed
    soldiers to act as personal bodyguards for bin Laden and other
    al Qaeda members. In 1994, according to Kohlmann, Sudanese
    intelligence even foiled an assassination attempt against bin
    Laden in Khartoum. On another occasion, Sudanese
    intelligence thwarted a plot against al Qaeda’s second-in-
    command, Ayman al-Zawahiri. Even as international pressure
    mounted on Sudan to expel bin Laden, Simon – who covered
    47
    terrorism matters for the NSC during the events in question –
    explained that the Sudanese government refused to provide
    actionable intelligence on al Qaeda’s plans throughout the
    region or to hand bin Laden over to the United States. Simon
    echoed the State Department’s conclusion that bin Laden’s
    eventual expulsion was nothing more than a “symbolic gesture
    designed to placate the international community” that changed
    little in the day-to-day reality of Sudan’s support for terrorism.
    See U.S. DEP’T OF STATE, PATTERNS OF GLOBAL TERRORISM:
    1998.
    From this evidence, all three experts concluded Sudan
    provided material support to al Qaeda. Moreover, the experts
    viewed this support as “indispensable” to the success of the
    1998 embassy bombings. Without “a country that not only
    tolerated, but actually actively assisted . . . al Qaeda terrorist
    activities,” Vidino asserted, “al Qaeda could not have achieved
    its attacks on the US Embassies.” Noting that “the vast majority
    of planning and preparation [for the attacks] took place
    between the years of 1991 and 1997,” Kohlmann opined
    “without the base that Sudan provided, without the capabilities
    provided by the Sudanese intelligence service, without the
    resources provided, none of this would have happened.” Simon
    likewise surmised “it’s difficult to see how . . . the attacks
    could have been carried out with equal success” without
    Sudan’s “active support” and safe haven.
    From the expert testimony, trial transcripts, and
    government reports, the district court concluded that the
    plaintiffs had met their burden of demonstrating “to the
    satisfaction of the court” that Sudan had provided material
    support to al Qaeda and that such support was a legally
    sufficient cause of the embassy bombings. Owens IV, 826 F.
    Supp. 2d. at 150. As such, the plaintiffs both established
    jurisdiction and prevailed on the merits of liability. When faced
    48
    with Sudan’s Rule 60(b)(4) motion to vacate the default
    judgments as void, the district court reaffirmed that its findings
    of material support and causation satisfied the standard for
    jurisdiction under § 1605A(a). Owens V, 174 F.3d at 276.
    On this appeal, Sudan contends the record contains
    insufficient evidence of material support and causation to give
    the court jurisdiction under the FSIA. Its attack comes in two
    forms. First, Sudan disputes the admissibility of much of the
    evidence introduced to support the district court’s factual
    findings. It does so despite having failed to participate in the
    evidentiary hearing, where such challenges would have been
    properly raised. Second, even assuming the evidence was
    admissible, Sudan contends the district court’s factual findings
    on material support and causation were clearly erroneous and
    insufficient to sustain jurisdiction as a matter of law. As we
    shall see, neither argument has merit.
    B. Standard of Review
    Sudan faces an uphill battle with its evidentiary challenges
    for two reasons. First is the burden of proof applicable to a
    FSIA case. The FSIA “begins with a presumption of immunity”
    for a foreign sovereign. Bell Helicopter Textron, Inc. v. Islamic
    Republic of Iran, 
    734 F.3d 1175
    , 1183 (D.C. Cir. 2013). The
    plaintiff bears an initial burden of production to show an
    exception to immunity, such as § 1605A, applies. Id. Then,
    “the sovereign bears the ultimate burden of persuasion to show
    the exception does not apply,” id., by a preponderance of the
    evidence. See Simon v. Republic of Hungary, 
    812 F.3d 127
    , 147
    (D.C. Cir. 2016). Therefore, if a plaintiff satisfies his burden of
    production and the defendant fails to present any evidence in
    rebuttal, then jurisdiction attaches.
    49
    Although a court gains jurisdiction over a claim against a
    defaulting defendant when a plaintiff meets his burden of
    production, the plaintiff must still prove his case on the merits.
    This later step, however, does not affect the court’s jurisdiction
    over the case, and a defaulting defendant normally forfeits its
    right to raise nonjurisdictional objections. See Practical
    Concepts, 
    811 F.2d at 1547
    . Thus, the only question before this
    court is whether the plaintiffs have met their rather modest
    burden of production to establish the court’s jurisdiction.
    This brings us to Sudan’s second obstacle on appeal. When
    assessing whether a plaintiff has met his burden of production,
    appellate review of the district court’s findings of fact and
    evidentiary rulings is narrowly circumscribed. With respect to
    a defaulting sovereign, the FSIA requires only that a plaintiff
    “establish[] his claim or right to relief by evidence satisfactory
    to the court.” 
    28 U.S.C. § 1608
    (e). This standard mirrors a
    provision in Federal Rule of Civil Procedure 55(d) governing
    default judgments against the U.S. Government. Commercial
    Bank of Kuwait v. Rafidain Bank, 
    15 F.3d 238
    , 242 (2d Cir.
    1994). While both § 1608(e) and Rule 55(d) give an
    unresponsive sovereign some protection against an unfounded
    default judgment, see Jerez, 775 F.3d at 423, neither provision
    “relieves the sovereign from the duty to defend cases,”
    Rafidain Bank, 
    15 F.3d at 242
    . Moreover, § 1608(e) does not
    “require the court to demand more or different evidence than it
    would ordinarily receive,” cf. Marziliano v. Heckler, 
    728 F.2d 151
    , 158 (2d Cir. 1984) (applying Rule 55(d)); indeed, “the
    quantum and quality of evidence that might satisfy a court can
    be less than that normally required.” Alameda v. Sec’y of
    Health, Ed. & Welfare, 
    622 F.2d 1044
    , 1048 (1st Cir. 1980)
    (applying Rule 55(d)).
    Unlike the court’s conclusions of law, which we review de
    novo, we review for abuse of discretion the district court’s
    50
    satisfaction with the evidence presented. Hill v. Republic of
    Iraq, 
    328 F.3d 680
    , 683 (D.C. Cir. 2003). A district court
    abuses its discretion when it relies upon a clearly erroneous
    finding of fact. Amador County v. U.S. Dep’t of the Interior,
    
    772 F.3d 901
    , 903 (D.C. Cir. 2014). In a FSIA default
    proceeding, a factual finding is not deemed clearly erroneous
    if “there is an adequate basis in the record for inferring that the
    district court . . . was satisfied with the evidence submitted.”
    Rafidain Bank, 
    15 F.3d at 242
     (quoting Marziliano, 
    728 F.2d at 158
    ). That inference is drawn when the plaintiff shows “her
    claim has some factual basis,” cf. Giampaoli v. Califano, 
    628 F.2d 1190
    , 1194 (9th Cir. 1980) (applying Rule 55(d)), even if
    she might not have prevailed in a contested proceeding.
    Provided “the claimant’s district court brief and reference to
    the record appear[] relevant, fair and reasonably
    comprehensive,” we will not set aside a default judgment for
    insufficient evidence. Alameda, 
    622 F.2d at 1049
    . This lenient
    standard is particularly appropriate for a FSIA terrorism case,
    for which firsthand evidence and eyewitness testimony is
    difficult or impossible to obtain from an absent and likely
    hostile sovereign.
    The district court also has an unusual degree of discretion
    over evidentiary rulings in a FSIA case against a defaulting
    state sponsor of terrorism. For example, we have allowed
    plaintiffs to prove their claims using evidence that might not be
    admissible in a trial. See Han Kim v. Democratic People’s
    Republic of Korea, 
    774 F.3d 1044
    , 1048-51 (D.C. Cir. 2014)
    (noting “courts have the authority – indeed, we think, the
    obligation – to adjust evidentiary requirements to differing
    situations” and admitting affidavits in a FSIA default
    proceeding) (internal alterations and quotation marks
    removed). This broad discretion extends to the admission of
    expert testimony, which, even in the ordinary case, “does not
    constitute an abuse of discretion merely because the factual
    51
    bases for an expert’s opinion are weak.” Joy v. Bell Helicopter
    Textron, Inc., 
    999 F.2d 549
    , 567 (D.C. Cir. 1993). Section
    1608(e) does not require a court to step into the shoes of the
    defaulting party and pursue every possible evidentiary
    challenge; only where the court relies upon evidence that is
    both clearly inadmissible and essential to the outcome has it
    abused its discretion. This is part of the risk a sovereign runs
    when it does not appear and alert the court to evidentiary
    problems. Cf. Bell Helicopter Textron, 734 F.3d at 1181.
    In this case, the district court has already undertaken to
    weigh the plaintiffs' evidence and determine its admissibility
    without any assistance from Sudan. Under these circumstances,
    we accord even more deference to the district court’s factual
    findings and evidentiary rulings in a FSIA case than in
    reviewing default judgments to which the strictures of
    § 1608(e) (or Rule 55(d)) do not apply.
    Deference is especially appropriate when considering the
    lengthy history of the proceedings in the district court. The
    same learned judge has presided over this litigation since 2001.
    Over that time, the court has gained considerable familiarity
    with the plaintiffs’ evidence and, during the periods when
    Sudan participated, with its objections to that evidence. The
    court has issued four lengthy and detailed opinions that directly
    address many of Sudan’s challenges to the evidence of material
    support and jurisdictional causation. Through its opinions and
    actions, it is abundantly clear that the district court both
    appreciated and carried out is obligation under § 1608(e). Cf.
    Compania Interamericana Exp.-Imp., S.A. v. Compania
    Dominicana de Aviacion, 
    88 F.3d 948
    , 951 (11th Cir. 1996)
    (vacating default judgment when “the record does not reflect
    that the court considered the differing standard required by
    § 1608(e)”). Only if we found the record wholly lacking an
    52
    “adequate basis” for the district court’s conclusions would we
    overturn its jurisdictional findings.
    C. Admissibility of the Evidence
    Sudan first challenges the admissibility of evidence
    supporting the district court’s findings of material support and
    jurisdictional causation. In order to issue a default judgment
    under § 1608(e), a court must base its findings of fact and
    conclusions of law upon evidence admissible under the Federal
    Rules of Evidence. Kim, 774 F.3d at 1049. If inadmissible
    evidence alone substantiates an essential element of
    jurisdiction, then the court abuses its discretion in concluding
    the claimant has established his case “by evidence satisfactory
    to the court.” 
    28 U.S.C. § 1608
    (e).
    Reviewing the admissibility of evidence supporting a
    default judgment presents significant challenges, which color
    our treatment of Sudan’s arguments. The adversarial process
    gives the parties an incentive to raise evidentiary challenges at
    the earliest opportunity because failure to do so ordinarily
    results in their forfeiture. Raising evidentiary challenges early
    on also provides the proponent of the evidence the opportunity
    to respond by offering an alternative theory of admissibility or
    different, admissible evidence on the same point. Thus, the
    adversarial process properly places the burden of admissibility
    upon the interested party, allocates the original determination
    of admissibility to the district court, which is more familiar
    with the evidence, and preserves evidentiary disputes for
    appellate review with the aid of a full trial record. Furthermore,
    allowing a defaulting defendant to benefit from sandbagging
    the plaintiff with an admissibility objection on appeal would be
    unfair and would encourage gamesmanship. When the
    defendant defaults, therefore, we do not consider its evidentiary
    challenges on appeal.
    53
    These principles do not map neatly to a FSIA case because
    a defaulting defendant may challenge the factual basis for the
    court’s jurisdiction for the first time on appeal. And because a
    FSIA plaintiff must produce evidence that is both admissible,
    Kim, 774 F.3d at 1049, and “satisfactory to the court,” 
    28 U.S.C. § 1608
    (e), in order to obtain a default judgment, we
    presume a defendant may also challenge for the first time on
    appeal the admissibility of evidence supporting a jurisdictional
    fact. As previously noted, however, a defendant sovereign that
    defers its challenge until appealing a default judgment makes
    the district court’s decision less fully informed and deprives the
    reviewing court of a fully developed record; it also handicaps
    the non-defaulting plaintiff in filling out the evidentiary record.
    For these reasons, we will not accept a belated challenge to
    admissibility raised by a defaulting sovereign unless the
    contested evidence is clearly inadmissible and we seriously
    doubt the plaintiff could have provided alternative evidence
    that would have been admissible. Those circumstances are not
    present here.
    In this case, Sudan principally challenges the admissibility
    of two types of evidence: (1) the plaintiffs’ expert testimony
    and (2) reports from the Department of State and the CIA. We
    find no error in the district court’s reliance upon either.
    1. The expert testimony
    In its opinions on liability and on Sudan’s Rule 60(b)
    motion, the district court discussed the experts’ testimony in
    great detail and concluded it sufficed to establish jurisdiction.
    Owens V, 174 F. Supp. 3d at 276. Because it may be
    dispositive, we, too, start with the expert testimony.
    54
    The testimony of expert witnesses is of crucial importance
    in terrorism cases, see, e.g., Kilburn, 
    376 F.3d at 1132
    (jurisdiction satisfied based solely upon the declaration of an
    expert witness); Boim v. Holy Land Found. for Relief & Dev.,
    
    549 F.3d 685
    , 704 (7th Cir. 2008); United States v. Damrah,
    
    412 F.3d 618
    , 625 (6th Cir. 2005), because firsthand evidence
    of terrorist activities is difficult, if not impossible, to obtain.
    Victims of terrorist attacks, if not dead, are often incapacitated
    and unable to testify about their experiences. Perpetrators of
    terrorism typically lie beyond the reach of the courts and go to
    great lengths to avoid detection. Eyewitnesses in a state that
    sponsors terrorism are similarly difficult to locate and may be
    unwilling to testify for fear of retaliation. The sovereigns
    themselves often fail to appear and to participate in discovery,
    as Sudan did here. With a dearth of firsthand evidence, reliance
    upon secondary materials and the opinions of experts is often
    critical in order to establish the factual basis of a claim under
    the FSIA terrorism exception.
    Sudan raises three challenges to the expert testimony
    presented at the evidentiary hearing. First, despite conceding
    that expert testimony is “doubtless admissible” in a FSIA
    default proceeding, Sudan contends that experts alone are
    insufficient to establish jurisdiction in the absence of other
    direct, admissible evidence. Second, Sudan objects that the
    plaintiffs’ experts merely served as conduits for inadmissible
    hearsay, upon which the district court relied. Finally, Sudan
    quarrels with the inferences drawn by the experts and by the
    district court from the underlying factual background. None of
    these arguments is persuasive.
    a. Need for direct evidence
    The recent case of Han Kim v. Democratic People’s
    Republic of Korea demonstrates the importance of expert
    55
    testimony in FSIA proceedings and forecloses Sudan’s first
    argument. In Kim, relatives of a pastor who was a U.S. citizen
    sued the Democratic People’s Republic of Korea (DPRK)
    under the FSIA terrorism exception, alleging the regime
    abducted, tortured, and killed the cleric for his ministry to
    DPRK refugees. 774 F.3d at 1046. Because the DPRK refused
    to participate in the litigation and intimidated potential
    eyewitnesses, the plaintiffs could offer no direct evidence of
    their relative’s torture and killing by the DPRK. Instead, two
    experts submitted declarations stating that North Korea
    invariably tortured and killed its political prisoners. Id. The
    court in Kim found these declarations “doubtless admissible”
    under Federal Rule of Evidence 702 and refused categorically
    to require eyewitness testimony or direct evidence on both
    practical and policy grounds:
    In these circumstances, requiring that the Kims
    prove exactly what happened to the Reverend
    and when would defeat the Act's very purpose:
    to give American citizens an important
    economic and financial weapon to compensate
    the victims of terrorism, and in so doing to
    punish foreign states who [sic] have committed
    or sponsored such acts and deter them from
    doing so in the future. This is especially true in
    cases of forced disappearance, like this one,
    where direct evidence of subsequent torture and
    execution will, by definition, almost always be
    unavailable, even though indirect evidence may
    be overwhelming. Were we to demand more of
    plaintiffs like the Kims, few suits like this could
    ever proceed, and state sponsors of terrorism
    could effectively immunize themselves by
    killing their victims, intimidating witnesses, and
    refusing to appear in court.
    56
    Id. at 1048-49 (internal citations and quotation marks
    omitted).
    Here, as in Kim, the plaintiffs face a state sponsor of
    terrorism that has refused to participate in the litigation. By
    skipping discovery and the evidentiary hearing, Sudan made it
    virtually impossible for the plaintiffs to get eyewitness
    accounts of its activities in the 1990s. Nor can the plaintiffs
    ordinarily subpoena members of al Qaeda, many of whom are
    dead or in hiding, to testify regarding the actions of the regime.
    The Congress originally enacted the terrorism exception in the
    FSIA because state sponsors of terrorism “ha[d] become better
    at hiding their material support” and misdeeds. Kilburn, 
    376 F.3d at 1129
     (internal quotation marks omitted). Just as
    requiring firsthand evidence of the DPRK’s covert atrocities in
    Kim would “effectively immunize” the regime from
    responsibility for its crimes, requiring that a victim of a state-
    supported bombing offer direct evidence of material support
    would shield state sponsors of terrorism from liability for the
    very predicate act – material support – that gives the court
    jurisdiction.
    Nevertheless, Sudan persists that expert testimony alone
    cannot establish jurisdiction and liability under the FSIA. To
    wit, Sudan complains that the plaintiffs did not offer “any
    admissible factual evidence” or “call any percipient witnesses
    competent to testify about relevant facts in Sudan in the
    1990s.” In particular, Sudan would have us distinguish Kim as
    having turned solely upon a piece of non-expert evidence.
    Sudan’s argument is both legally and factually flawed.
    Neither § 1608(e) nor any other provision of the FSIA requires
    a court to base its decision upon a particular type of admissible
    evidence. As long as the evidence itself is admissible, as expert
    57
    testimony certainly may be, and the court finds it satisfactory,
    its form or type is irrelevant. Cf. Holland v. United States, 
    348 U.S. 121
    , 140 (1954) (refusing to distinguish between different
    types of evidence in a criminal prosecution). Indeed, cases in
    this Circuit and in others have repeatedly sustained jurisdiction
    or liability or both under the terrorism exception to the FSIA
    and in other terrorism cases based solely upon expert
    testimony. Kilburn, 
    376 F.3d at 1132
    ; Boim, 
    549 F.3d at 705
    (“[W]ith [the plaintiff’s expert report] in the record and nothing
    on the other side the [district] court had no choice but to enter
    summary judgment for the plaintiffs with respect to Hamas’s
    responsibility for the Boim killing”). Therefore the plaintiffs’
    “failure” to present eyewitness testimony or other direct
    evidence is of no moment as to whether they have satisfied their
    burden of production.
    Sudan’s attempt to distinguish Kim on its facts is similarly
    unpersuasive. True, in Kim, we placed great weight upon a
    single piece of admissible non-expert evidence: the conviction
    of a DPRK agent who had kidnapped the victim, of which the
    district court took judicial notice. Kim, 774 F.3d at 1049. This
    conviction placed the victim at the scene of the crime and
    allowed the court to conclude he had been subjected to the
    torture and killing that the DPRK “invariably” inflicts upon its
    prisoners. Id. at 1051. Without this conviction, we noted, “[o]ur
    conclusion would no doubt differ” because there was no other
    evidence linking the DPRK to the victim’s disappearance. Id.
    Our conclusion, however, turned upon the specific facts of
    that case; we did not announce a categorical requirement of
    direct evidence in FSIA cases. Whereas the conviction in Kim
    linked the defendant sovereign to the plaintiff’s disappearance,
    in the present case there is no missing link between Sudan’s
    actions and the embassy bombings. It is undisputed that al
    Qaeda came to Sudan in the early 1990s and maintained its
    58
    headquarters there. It is also beyond question that al Qaeda
    perpetrated the embassy bombings in 1998. As in Kim, expert
    testimony supplies the predicate act (here material support, in
    Kim torture and extrajudicial killing) linking these two events
    and conferring jurisdiction upon the court. But here, unlike in
    Kim, we need no further evidence beyond the expert testimony
    to connect the defendant sovereign to the extrajudicial killings.
    The expert testimony therefore suffices to meet the plaintiffs’
    burden of production on jurisdiction.
    b. Reliance upon inadmissible hearsay
    Sudan next contends the experts recited facts based upon
    inadmissible hearsay and the district court improperly relied
    upon those facts to establish jurisdiction and to hold Sudan
    liable.
    Under Federal Rule of Evidence 703, a properly qualified
    expert may base his opinion upon otherwise inadmissible
    sources of information as long as those sources are reasonably
    relied upon in his field of expertise. Further, the expert may
    disclose to the factfinder otherwise inadmissible “underlying
    facts or data as a preliminary to the giving of an expert
    opinion.” See, e.g., FED. R. EVID. 705 advisory committee’s
    note. Indeed, disclosure is often necessary to enable the court
    to “decid[e] whether, and to what extent, the person should be
    allowed to testify.” Id.; 2 MCCORMICK ON EVIDENCE § 324.3
    (7th ed. 2016) (“otherwise the opinion is left unsupported with
    little way for evaluation of its correctness”). Nevertheless, “the
    underlying information” relied upon by a qualified expert “is
    not admissible simply because the [expert’s] opinion or
    inference is admitted.” See FED. R. EVID. 703 advisory
    committee’s note. Thus, as Sudan points out, “a party cannot
    call an expert simply as a conduit for introducing hearsay under
    the guise that the testifying expert used the hearsay as the basis
    59
    of his testimony.” Marvel Characters, Inc. v. Kirby, 
    726 F.3d 119
    , 136 (2d Cir. 2013) (internal quotation marks omitted).
    Applying these standards to the case at hand, we see that
    the district court properly distinguished the experts’ clearly
    admissible opinions from the potentially inadmissible facts
    underlying their testimony. Sudan principally objects to the
    district court’s recitation of those underlying facts in its 2011
    opinion on liability, which facts it claims are inadmissible even
    if the experts’ opinions were properly admitted. The district
    court acknowledged this complication in its 2016 opinion on
    Sudan’s motion to vacate: “Sudan may have plausible
    arguments” that not “every factual proposition in the Court’s
    2011 opinion can be substantiated by record evidence
    admissible under the Federal Rules of Evidence.” Owens V,
    174 F. Supp. 3d at 275. But even if “particular statements in
    that opinion may not be adequately supported,” the experts’
    opinions “nonetheless” provided “sufficient evidence in the
    record of the necessary jurisdictional facts.” Id. We agree with
    this conclusion.
    At the outset, we note the district court did not err – much
    less prejudicially err – in reciting potentially inadmissible facts
    in its 2011 opinion on liability. For their conclusions to be
    admissible and credible, the plaintiffs’ experts needed to
    disclose the factual basis for their opinions. See, e.g., Fox v.
    Taylor Diving & Salvage Co., 
    694 F.2d 1349
    , 1356 (5th Cir.
    1983) (“An expert is permitted to disclose hearsay for the
    limited purpose of explaining the basis for his expert opinion”).
    Without that disclosure, the district court would have been at a
    loss to determine whether the opinions were admissible as
    reliable expert testimony. See FED. R. EVID. 702 (requiring
    court to determine whether expert’s knowledge “is based on
    sufficient facts or data,” and is “the product of reliable
    principles and methods” that have been “reliably applied . . . to
    60
    the facts of the case”). Therefore, the court did not err in
    allowing the plaintiffs’ experts to recount potentially
    inadmissible facts in order to establish the basis for their
    admissible opinions.
    The district court also needed to engage with the
    underlying facts in order to explain why it admitted and
    credited the experts’ opinions. Without those facts, we too
    would struggle to evaluate Sudan’s evidentiary challenges to
    the opinion testimony. Hence, some discussion of the
    potentially inadmissible underlying facts was unavoidable in
    the 2011 opinion in order to admit, to credit, and to enable our
    review of the experts’ opinions.
    More important, the district court properly based its
    findings upon the experts’ “undoubtedly admissible” opinions
    and not upon any arguably inadmissible facts. The district
    court’s 2011 and 2016 opinions extensively quote the experts’
    opinions in reaching the conclusion that Sudan’s material
    support caused the embassy bombings. See Owens V, 174 F.
    Supp. 3d at 277-79 (quoting the opinions of Kohlmann, Simon,
    and Vidino); Owens IV, 
    826 F. Supp. 2d at 146
     (quoting Simon
    and Kohlmann to conclude “Sudanese government support was
    critical to the success of the 1998 embassy bombings”). We
    therefore see no error in the court’s conclusion that the expert
    testimony satisfied the plaintiffs’ burden of production on
    jurisdictional causation.
    In a supplemental filing, Sudan compares the experts’
    opinions in this case to those held inadmissible in Gilmore v.
    Palestinian Interim Self-Government Authority, 
    843 F.3d 958
    (D.C. Cir. 2016), but the gulf between the two cases is wide. In
    Gilmore, the plaintiff’s expert neither stated nor applied “a
    reliable methodology” from which he had derived his opinions.
    
    Id. at 972-73
    . Instead, “his analysis consist[ed] entirely of
    61
    deductions and observations that flow directly from the content
    of the hearsay statements and would be self-evident to a
    layperson.” Gilmore v. Palestinian Interim Self-Gov’t Auth., 
    53 F. Supp. 3d 191
    , 213 (D.D.C. 2014). Indeed, the Gilmore
    expert’s opinion derived solely from materials that had been
    proffered at trial but excluded as inadmissible hearsay. 
    Id. at 212-13
    . In this case, the plaintiffs’ experts relied upon their
    own extensive research into terrorist organizations to conclude
    that Sudan provided material support that caused the embassy
    bombings. In doing so, the experts – unlike the expert in
    Gilmore – drew upon both materials admitted at the evidentiary
    hearing and sources encountered in their research and
    professional experience. A “layperson” could not reliably have
    reached the same conclusions as the experts in this case.
    Finally, Sudan belatedly challenges the reliability of the
    factual bases for the experts’ testimony. Of course, “the
    decision whether to qualify an expert witness is within the
    broad latitude of the trial court and is reviewed for abuse of
    discretion.” Haarhuis v. Kunnan Enters., 
    177 F.3d 1007
    , 1015
    (D.C. Cir. 1999) (citing Kumho Tire Co. v. Carmichael, 
    526 U.S. 137
    , 152 (1999)). As previously stated, experts may rely
    upon hearsay evidence in forming their admissible,
    professional opinions. Indeed, it is hard to imagine what other
    than hearsay an expert on terrorism could use to formulate his
    opinion. See Boim, 
    549 F.3d at 704
     (“Biologists do not study
    animal behavior by placing animals under oath, and students of
    terrorism do not arrive at their assessments solely or even
    primarily by studying the records of judicial proceedings”). All
    the Federal Rules require is that the “facts or data in the
    particular case upon which an expert bases an opinion or
    inference . . . [are] of a type reasonably relied upon by experts
    in the particular field in forming opinions or inferences upon
    the subject.” FED. R. EVID. 703 (2010) (amended without
    substantive change 2011).
    62
    Here, the plaintiffs’ experts used, among other things, trial
    testimony of al Qaeda informants, intelligence reports from the
    U.S. Government, and their exhaustive review of secondary
    sources to reach their conclusions. Courts have consistently
    held these sorts of materials provide an adequate basis for
    expert testimony on terrorism. See Damrah, 
    412 F.3d at
    625 &
    n.4 (approving an expert’s reliance upon books, press releases,
    newspaper articles, and the State Department’s Patterns of
    Global Terrorism reports); Boim, 
    549 F.3d at 704-05
    (approving reliance upon terrorist websites and observations
    from prior criminal trials). In light of the general acceptance of
    the plaintiffs’ experts’ sources and methodologies, we
    conclude the district court did not abuse its discretion in
    qualifying the experts, summarizing their testimony, or
    crediting their conclusions.
    c. Reliability of the experts’ conclusions
    Sudan’s third objection attacks the reliability of the
    experts’ opinions in this case as inconsistent with the
    underlying facts. In other words, Sudan asks this court to hold
    the expert opinions are inadmissible because the plaintiffs’
    witnesses have not “reliably applied [their] principles and
    methods to the facts of the case.” See FED. R. EVID. 702(d).
    This challenge also implies the district court based its findings
    of jurisdiction upon clearly erroneous facts. See Price, 389 F.3d
    at 197 (reviewing for clear error jurisdictional findings of fact
    in a FSIA terrorism case); see also Duke Power Co. v. Carolina
    Envtl. Study Grp., 
    438 U.S. 59
    , 74-77 (1978).
    The problem with this argument is that Sudan has not
    explained – either at the evidentiary hearing or on appeal – why
    these expert opinions are unreliable or clearly erroneous. By
    refusing to participate in the evidentiary hearing, Sudan gave
    63
    up its opportunity to challenge the fit between the experts’
    opinions and the underlying facts. At the hearing, the witnesses
    described the general bases of their expertise, and the district
    court found them qualified to give opinions on Sudan’s
    material support for al Qaeda. In doing so, the experts said they
    had relied upon multiple sources of information, including but
    not limited to those presented at the hearing. But the experts
    did not – and did not need to – provide the specific basis for
    their knowledge for each factual proposition they advanced.
    See FED. R. EVID. 705 (“an expert may state an opinion – and
    give the reasons for it – without first testifying to the
    underlying facts or data”). Therefore, we cannot know with
    certainty whether the experts’ opinions were consistent or in
    conflict with the underlying facts upon which they relied. Had
    Sudan participated in the hearing, it could have challenged the
    experts to substantiate each and every factual proposition they
    asserted. Cf. Bryan v. John Bean Div. of FMC Corp., 
    566 F.2d 541
    , 545 (5th Cir. 1978) (noting “the onus of eliciting the bases
    of the opinion is placed on the” party opposing admission).
    That would have allowed this court to determine whether the
    experts’ opinions reliably reflected the more developed factual
    record. By deferring its attack until this appeal, Sudan has
    deprived the experts of an opportunity to respond, and instead
    asks this court to rule on an incomplete record. We decline the
    invitation. See Boim, 
    549 F.3d at 704-05
     (rejecting a challenge
    to the reliability of an expert’s inferences first brought on
    appeal).
    2. The State Department reports
    Of course, the district court did not rely solely upon expert
    testimony to establish jurisdiction and liability. Of particular
    importance, the plaintiffs marshaled nearly a decade of State
    Department reports that speak directly to Sudan’s support for
    terrorist groups, including al Qaeda. See, e.g., U.S. DEP’T OF
    64
    STATE, PATTERNS OF GLOBAL TERRORISM: 1993 (“Despite
    several warnings to cease supporting radical extremists the
    Sudanese government continued to harbor international
    terrorist groups in Sudan”); U.S. DEP’T OF STATE, PATTERNS
    OF GLOBAL TERRORISM: 1998 (“Sudan provides safe haven to
    some of the world’s most violent terrorist groups, including
    Usama Bin Ladin’s al-Qaida”); U.S. DEP’T OF STATE,
    PATTERNS OF GLOBAL TERRORISM: 2000 (2001) (“Sudan . . .
    continued to be used as a safe haven by members of various
    groups, including associates of Osama bin Laden’s al-Qaeda
    organization”). These reports both bolster the experts’
    conclusions about Sudan’s material support for the al Qaeda
    embassy bombings and independently show the plaintiffs’
    claims “ha[ve] some factual basis,” as required by § 1608(e).
    Giampaoli, 
    628 F.2d at 1194
    .
    As with the expert testimony, Sudan contends these reports
    are inadmissible hearsay. The plaintiffs urge the State
    Department reports were admissible under the hearsay
    exception for public records. See FED. R. EVID. 803(8). That
    exception allows the admission of “a record or statement of a
    public office if” it: (1) contains factual findings (2) from a
    legally authorized investigation. Id at 803(8)(iii). Pursuant to
    the “broad approach to admissibility” under Rule 803(8), a
    court may also admit “conclusion[s] or opinion[s]” contained
    within a public record. Beech Aircraft Corp. v. Rainey, 
    488 U.S. 153
    , 170 (1988). Once proffered, a public record is
    presumptively admissible, and the opponent bears the burden
    of showing it is unreliable. Bridgeway Corp. v. Citibank, 
    201 F.3d 134
    , 143 (2d Cir. 2000).
    The State Department’s Patterns of Global Terrorism
    reports fit squarely within the public records exception. First,
    the reports contain both factual findings and conclusions on
    Sudan’s support for terrorism in general and al Qaeda in
    65
    particular. Second, the reports were created pursuant to statute,
    see 22 U.S.C. § 2656f(a) (requiring annual reports on
    terrorism), and are therefore the product of a “legally
    authorized investigation.” See Bridgeway, 
    201 F.3d at 143
    (holding State Department reports required by statute are
    public records). Indeed, in contested FSIA proceedings we
    have previously approved admission of the very reports Sudan
    challenges, Simpson, 470 F.3d at 361; Kilburn, 
    277 F. Supp. 2d at 33
    , aff'd 
    376 F.3d at 1131
    , as have other courts, Damrah, 
    412 F.3d at
    625 n.4.
    Sudan objects on appeal to the “trustworthiness” of these
    reports, but that objection should have been made in the district
    court. See FED. R. EVID. 803(8)(B) (providing for the
    admission of public records if “the opponent does not show that
    the possible source of the information or other circumstances
    indicate a lack of trustworthiness”). Even now, Sudan does not
    present any reason, beyond their reliance upon hearsay, to
    deem these reports unreliable. See Kehm v. Procter & Gamble
    Mfg. Co., 
    724 F.2d 613
    , 618 (8th Cir. 1983) (holding inclusion
    of hearsay is not a sufficient ground for excluding a public
    record as unreliable). 4 Although the reports lack the details that
    the expert witnesses provided concerning Sudan’s material
    support, they are competent, admissible evidence, which
    4
    In a supplemental filing, Sudan compares these reports to excerpts
    on an Israeli governmental website in Gilmore that we excluded as
    inadmissible hearsay outside the exception for public records. But
    Gilmore turned upon the plaintiffs’ failure to establish a foundation
    for admissibility; they “rested on a bare, one-sentence assertion that
    the web pages were admissible under Rule 803(8)” and gave no
    “further explication of how the pages conveyed ‘factual findings
    from a legally authorized investigation.’” 843 F.3d at 969-70. The
    webpages themselves “offer[ed] no information explaining who
    made the findings or how they were made.” Id. at 969.
    66
    together with the plaintiffs’ admissible opinion evidence
    satisfy the burden of production on material support and
    jurisdictional causation. Because Sudan, by defaulting in the
    district court, has not carried its burden of persuasion, the
    district court properly asserted jurisdiction over the cases. 5
    D. Sufficiency of the Evidence
    This brings us to Sudan’s second major challenge to the
    plaintiffs’ evidence. In addition to disputing the admissibility
    of the evidence, Sudan argues the totality of the evidence
    cannot establish material support and jurisdictional causation
    as a matter of law. First, Sudan contends the plaintiffs cannot
    5
    Sudan also objects to the admission of the recorded testimony of
    Jamal al Fadl at the Bin Laden criminal trial, contending it is
    inadmissible hearsay. We agree to the extent that al Fadl’s prior
    testimony is not admissible as “former testimony” under the hearsay
    exception in Rule 804(b)(1) because it was not “offered against a
    party who had . . . an opportunity and similar motive to develop it
    by” cross-examination in the prior criminal case.
    The district court held, and the plaintiffs argue on appeal, that
    Sudan’s inability to cross-examine al Fadl was irrelevant in a non-
    adversarial evidentiary hearing. After all, they note, courts have
    admitted sworn affidavits in § 1608(e) hearings in previous FSIA
    cases. Owens V, 174 F. Supp. 3d at 280-81 & n.18 (citing Antoine v.
    Atlas Turner, Inc., 
    66 F.3d 105
    , 111 (6th Cir. 1995) and Kim, 774
    F.3d at 1049-51). But in each case cited, the out-of-court declarant
    was at least potentially available to testify in court, should the need
    arise. Plaintiffs here have made no such showing regarding al Fadl,
    who is in the witness protection program. For this reason, we hesitate
    to equate affidavits prepared for a FSIA hearing with former trial
    testimony recorded for a wholly separate purpose. We, however,
    need not decide whether al Fadl’s prior trial testimony is otherwise
    admissible because sufficient, admissible evidence sustains the
    district court’s findings of jurisdiction in this case.
    67
    show its actions caused the plaintiffs’ injuries because its
    conduct neither substantially nor foreseeably provided material
    support for the embassy bombings. Second, Sudan argues the
    plaintiffs cannot recover because its support, if any, was not
    intended to cause the bombings.
    1. Proximate causation
    Sudan’s first challenge to the sufficiency of the evidence
    rests upon the standard for jurisdictional causation, viz.,
    proximate cause. In Kilburn, we held a plaintiff must show
    proximate cause to establish jurisdiction under § 1605(a)(7),
    the predecessor of the current FSIA terrorism exception. 
    376 F.3d at 1128
    . Because § 1605A(a) restates the predicate acts of
    § 1605(a)(7), it stands to reason that proximate cause remains
    the jurisdictional standard.
    Proximate cause requires “some reasonable connection
    between the act or omission of the defendant and the damage
    which the plaintiff has suffered.” Id. (quoting PROSSER &
    KEETON ON THE LAW OF TORTS 263 (5th ed. 1984)). It
    “normally eliminates the bizarre,” Jerome B. Grubart, Inc. v.
    Great Lakes Dredge & Dock Co., 
    513 U.S. 527
    , 536 (1995),
    “preclud[ing] liability in situations where the causal link
    between conduct and result is so attenuated that the
    consequence is more aptly described as mere fortuity.”
    Paroline v. United States, 
    134 S. Ct. 1710
    , 1719 (2014). As
    Sudan points out, the inquiry into proximate cause contains two
    similar but distinct elements. First, the defendant’s actions
    must be a “substantial factor” in the sequence of events that led
    to the plaintiff’s injury. Rothstein v. UBS, 
    708 F.3d 82
    , 91 (2d
    Cir. 2013). Second, the plaintiff’s injury must have been
    “reasonably foreseeable or anticipated as a natural
    consequence” of the defendant’s conduct. 
    Id.
     Sudan contends
    that its support satisfies neither element of the inquiry into
    68
    proximate cause with respect to the 1998 embassy bombings
    here at issue.
    a. Substantial factor
    Sudan offers two reasons its actions were not a “substantial
    factor” in al Qaeda’s embassy bombings. Most basically,
    Sudan contends it did not provide any material support at all to
    al Qaeda during the 1990s, making proximate causation
    impossible. Much of this argument reprises Sudan’s objections
    to the inferences drawn by the experts from al Fadl’s testimony,
    which objections we have considered and rejected.
    Nevertheless, Sudan points to a number of events as to
    which it contends the district court erroneously found material
    support for al Qaeda. For example, Sudan criticizes the district
    court’s discussion of al Qaeda purchasing properties, starting
    businesses, and establishing terrorist training camps in Sudan.
    Owens IV, 
    826 F. Supp. 2d at 141, 143-44
    . Viewed in isolation,
    none of these events necessarily evinces a Sudanese hand in al
    Qaeda’s activities. That view, however, like Nelson at the
    Battle of Copenhagen, turns a blind eye to the broader picture.
    The record shows that after al Qaeda started its businesses,
    Sudan fostered their growth through tax exceptions and
    customs privileges. This allowed al Qaeda nearly to
    monopolize the export of several agricultural commodities,
    plowing its profits back into its broader organization. Again,
    after al Qaeda opened its training camps, Sudanese intelligence
    shielded their operations from the local police despite
    complaints from nearby residents. This preferential treatment
    certainly qualifies as material support, even if Sudan played no
    role in creating the underlying businesses and training camps.
    Sudan also disputes the district court’s finding that it
    provided financial support to al Qaeda. To the contrary, Sudan
    69
    argues, al Qaeda financially supported Sudan by investing in
    Sudanese infrastructure. Sudan is correct – bin Laden did
    provide financial assistance to Sudan – but it ignores record
    evidence of Sudan’s reciprocal aid. For example, as the district
    court noted, bin Laden’s $50 million investment in the partially
    state-owned al Sharmal Islamic Bank gave al Qaeda “access to
    the formal banking system,” which proved useful for
    “laundering money” and “financing terrorist operations.” 
    Id. at 144
    . Al Qaeda operatives, including bin Laden himself, held
    accounts in their real names in al Sharmal bank, demonstrating
    the impunity with which the group operated in Sudan. Thus,
    although Sudan did not directly fund al Qaeda or its business,
    the court reasonably concluded its in-kind assistance had the
    same practical effect.
    Finally, Sudan invokes the testimony of Simon, the former
    NSC staffer overseeing counterterrorism activities, that Sudan
    provided no “useful information on bin Laden’s” activities that
    “might have helped the U.S. unravel the plots to attack the two
    East African U.S. embassies.” 
    Id. at 145
    . The district court’s
    finding of material support, Sudan argues, is unsustainable
    “without a showing that Sudan had useful intelligence and
    nonetheless elected not to share it.” Although the district court
    did not say what Sudan knew about al Qaeda or when it knew
    it, Sudan’s claims of ignorance regarding al Qaeda’s aims
    defies both reason and the record. After all, Sudan invited
    “literally every single jihadist style group,” including al Qaeda,
    to relocate to Sudan in the early 1990s. At the time, bin Laden
    was known as a wealthy Islamist financier and a leader in the
    Afghani mujahedeen. As soon as al Qaeda took up residence in
    Sudan, bin Laden began issuing fatwas denouncing the United
    States and calling for attacks upon U.S. interests. And after the
    Battle of Mogadishu in 1993, al Qaeda operatives publically
    boasted about killing U.S. soldiers in Somalia. According to
    Kohlmann, bin Laden himself took to the Arab press and U.S.
    70
    cable television to claim responsibility for this attack. Sudanese
    intelligence officers would have been privy to all this
    information because they frequented al Qaeda’s guesthouses,
    and al Turabi’s NIF shared offices with al Qaeda for a time.
    Sudan’s own actions also gave it knowledge of al Qaeda’s
    capabilities and aims. For example, Sudanese intelligence must
    have known that al Qaeda operated training camps where
    explosives were used because it shielded those camps from
    interference by the local police. Sudan also knew al Qaeda was
    transporting large, undeclared sums of money to Kenya
    because Sudanese agents shepherded operatives with this
    money past airport inspections. Likewise, Sudan knew
    something of al Qaeda’s arsenal because its own planes
    transported al Qaeda’s weapons from Afghanistan to Sudan.
    Indeed, on one occasion, a Sudanese official even assisted al
    Qaeda in an ultimately unsuccessful bid to obtain nuclear
    weapons from a smuggler in South Africa. Contrary to Sudan’s
    contention, all this information would have aided the United
    States in appreciating the threat of al Qaeda and attempting to
    disrupt its operations. Sudan’s refusal to divulge any of this
    information – even after a specific request from the United
    States in 1996 – certainly qualifies as material support. Cf.
    Estate of Parsons v. Palestinian Auth., 
    651 F.3d 118
    , 125-26
    (D.C. Cir. 2011) (security officers who, with knowledge, failed
    to intervene in ongoing bomb plot provided material support).
    Sudan’s second argument that its actions were not a
    “substantial factor” causing the plaintiffs’ injuries focuses
    upon the temporal distance between Sudan’s support for al
    Qaeda and the embassy bombings. Principally, Sudan argues
    that by expelling bin Laden in 1996 it broke the chain of
    causation leading to the 1998 embassy bombings. We
    confronted and rejected the same objection in our 2008 opinion
    affirming the district court’s denial of Sudan’s motion to
    71
    dismiss. Owens III, 
    531 F.3d at 895
    . Although we there
    recognized the “[p]laintiffs’ allegations are somewhat
    imprecise as to the temporal proximity of Sudan’s actions to
    and their causal connection with the terrorist act,” we held “this
    imprecision [was] not fatal for purposes of jurisdictional
    causation.” 
    Id.
     (quoting Rux v. Republic of Sudan, 
    461 F.3d 461
    , 474 (4th Cir. 2006)) (internal quotation marks omitted). In
    order to bridge the gap, we noted the plaintiffs’ “allegations,
    and the reasonable inferences drawn therefrom” need only
    “demonstrate a reasonable connection between the foreign
    state’s actions and the terrorist act.” 
    Id.
     In other words,
    provided the plaintiffs demonstrated proximate cause, the
    temporal remoteness between Sudan’s material support and the
    embassy bombings was irrelevant. See Grubart, 
    513 U.S. at 536
     (proximate cause “normally eliminates the bizarre”
    without “the need for further temporal or spatial limitations”).
    And at that stage in the litigation, we concluded, the plaintiffs
    had more than met their burden of pleading facts sufficient to
    establish proximate causation. Owens III, 
    531 F.3d at 895
    .
    Fast-forwarding to the present day, the plaintiffs have
    substantiated their allegations of material support and
    jurisdictional causation with admissible evidence, which Sudan
    did not challenge at the evidentiary hearing. Once again, the
    district court found the evidence established a “reasonable
    connection” between Sudan’s actions and the embassy
    bombings. As in our 2008 decision, we see nothing erroneous
    with this conclusion for two reasons.
    First, we do not believe Sudan broke the chain of
    proximate causation by completely disassociating itself from al
    Qaeda in or after 1996. A declassified CIA President’s Daily
    Brief in December 1998 – months after the embassy bombings
    – reports a “Bin Laden associate in Sudan” sending materials
    to al Qaeda in Afghanistan. The State Department’s 1998
    72
    Patterns of Global Terrorism further reports that “Sudan
    continued to serve as a meeting place, safehaven, and training
    hub for a number of international terrorist groups, particularly
    Usama Bin Ladin’s al-Qaida organization” even after the
    embassy bombings. Although counterterrorism cooperation
    between the United States and Sudan improved after the
    bombings, the 2000 Patterns of Global Terrorism report
    reiterates “Sudan continued to serve as a safehaven for
    members of al-Qaida, the Lebanese Hizballah, al-Gama’a al-
    Islamiyya, Egyptian Islamic Jihad, the PIJ, and HAMAS.” In
    addition, both Kohlmann and Simon testified that al Qaeda
    operatives remained in Sudan after 1996. Sudan insists that a
    gap remained between its expulsion of bin Laden and the
    government reports detailing al Qaeda’s presence in Sudan in
    late 1998, but it strains credulity that Sudan would immediately
    resume relations with al Qaeda following bombings for which
    the group claimed credit after completely cutting ties two years
    earlier. Rather, as the district court inferred, it is far more likely
    that Sudan, despite having expelled bin Laden in 1996,
    continued to harbor al Qaeda terrorists until and after the
    bombings.
    Second, even if Sudan were correct on this factual point,
    severing ties with al Qaeda would not preclude a finding that
    its material support remained a substantial factor in the
    embassy bombings. See Boim, 
    549 F.3d at 699-700
     (holding a
    “two year[]” interval between the defendant’s material support
    and the plaintiff’s injury was far from the point at which
    “considerations of temporal remoteness might . . . cut off
    liability”).
    Sudan counters by selectively quoting the 9/11
    Commission Report, stating “Bin Ladin left Sudan . . .
    significantly weakened.” Perhaps so if viewed in isolation, but
    bin Laden’s expulsion did not undo the support Sudan provided
    73
    in the previous years. Sudan’s invitation, after all, allowed al
    Qaeda to extricate itself from a war-torn Afghanistan and
    organize its terrorist enterprise in a stable safe haven. During
    al Qaeda’s stay, Sudan sheltered the group from foreign
    intelligence and facilitated its movement throughout the region.
    It also put al Qaeda in contact with other, more experienced
    terrorist groups residing in Sudan. These actions allowed al
    Qaeda to grow its membership, to develop its capabilities, and
    to establish the cells in Kenya and Tanzania, which ultimately
    launched the 1998 bombings. Indeed, “the vast majority of the
    planning and preparation [for the embassy attacks] took place
    between the years of 1991 and 1997” when Bin Laden, for the
    most part, remained in the Sudan. According to one expert,
    Sudan’s expulsion of bin Laden may have even “accelerated
    the bomb plot” by allowing al Qaeda to militarize its African
    cells without fear of reprisal against him by the United States,
    which had known of his presence in Sudan. Id. at 310-11. As
    Sudan notes, al Qaeda had not committed “any terrorist attacks
    predating” its arrival in the country, and indeed “the idea that
    al-Qaeda was capable of anything significant” in the early
    1990s “was laughable.” Yet in a few short years, al Qaeda
    progressed from mounting small-scale, often-unsuccessful
    attacks to orchestrating the near-simultaneous bombings of
    American embassies in two different countries. Although the
    expulsion of bin Laden may have marked a temporary setback
    for Al Qaeda, on balance, the organization benefited greatly
    from Sudan’s aid during the 1990s. Therefore, the district
    court’s conclusion that Sudan’s support was a “substantial
    factor” in the chain of causation leading to the embassy
    bombings was far from clearly erroneous.
    b. Reasonable foreseeability
    Sudan contends even if its support was a “significant
    factor” in the embassy bombings, the attacks were not
    74
    “reasonably foreseeable or anticipated as a natural
    consequence” of that support. Principally, Sudan argues it was
    not foreseeable in 1991 – when Sudan invited bin Laden to
    relocate – that al Qaeda would engage in terrorist activities. As
    evidence, Sudan points out that bin Laden was not yet infamous
    for acts of terrorism and the United States had not yet
    designated al Qaeda a terrorist organization or bin Laden a
    terrorist and did not do so until after the embassy bombings.
    Designation of Foreign Terrorist Organizations, 
    64 Fed. Reg. 55,112
    , 55,112/1 (Oct. 8, 1999); Exec. Order No. 13099, 
    63 Fed. Reg. 45,167
    , 45,167 (Aug. 20, 1998). That bin Laden and
    al Qaeda “may have abused their opportunities” in the country,
    Sudan urges, does not mean it should be held accountable when
    “its residents later turn out to be terrorists.”
    Once again Sudan ignores the broader context of its
    actions. In the early 1990s the Sudanese government reached
    out to numerous terrorist groups, including the “Palestinian
    HAMAS movement, the Palestinian Islamic Jihad, Hezbollah,
    . . . al Qaeda, the Egyptian Islamic Jihad, the Libyan Islamic
    Fighting Group, dissident groups from Algeria, Morocco, the
    Eritrean Islamic Jihad movement.” Owens IV, 
    826 F. Supp. 2d at 141
     (quoting Kohlmann). “[L]iterally every single jihadist
    style group, regardless of what sectarian perspective they had,
    was invited to take a base in Khartoum” during this period. 
    Id.
    That al Qaeda was included in this list of renowned terrorist
    organizations supports an inference that its terrorist aims were
    foreseeable – indeed, foreseen – at the time of Sudan’s
    invitation.
    Sudan’s own briefs implicitly concede the foreseeability
    of al Qaeda’s aims in the early 1990s. To wit, Sudan reiterates
    the district court’s finding that “Bin Laden ‘was a famous
    mujahedeen fighter who had successfully fought the Soviet
    Union’ and ‘was thought to be fabulously wealthy.’” See
    75
    Owens IV, 
    826 F. Supp. 2d at 140-41
    . Yet it argues “the idea
    that al-Qaeda was capable of anything significant was
    laughable.” True, al Qaeda was then a fledgling terrorist
    organization, but one led by a “famous . . . fighter” and a
    “fabulously wealthy” fundamentalist jihadi who had
    “successfully fought” a world superpower. Any impartial
    observer could see the group’s future potential for mayhem far
    outstripped its then already substantial capabilities. Sudan
    cannot bury its head in the sand and contend otherwise.
    Furthermore, as its relationship with al Qaeda deepened,
    Sudan undoubtedly became aware of al Qaeda’s hostility to the
    United States and its intention to launch attacks against
    American interests. Starting in 1991, bin Laden issued a series
    of fatwas against the United States from Khartoum, and al
    Qaeda operatives publically boasted about attacking American
    soldiers in Somalia in 1993. Despite this, Sudan continued to
    assist the group in moving people and resources throughout the
    region. Sudan’s claimed ignorance of al Qaeda’s specific aim
    to bomb American embassies focuses too narrowly upon those
    events; Sudan could not help but foresee that al Qaeda would
    attack American interests wherever it could find them.
    In sum, Sudan’s actions in the 1990s were undoubtedly a
    “substantial factor in the sequence of responsible causation”
    that led to the embassy bombings. Rothstein, 708 F.3d at 91.
    Moreover, the bombings were a “reasonably foreseeable or
    anticipated as a natural consequence” of its material support.
    Id. Therefore, the district court correctly held that the plaintiffs
    had demonstrated proximate cause, establishing jurisdiction
    under the FSIA.
    76
    2. Sudan’s specific intent
    Sudan resists this conclusion by attempting to graft an
    additional requirement onto the proximate cause analysis. The
    FSIA terrorism exception, Sudan argues, requires something
    more than proximate causation: “The foreseeability aspect of
    proximate causation” it says, “is reinforced by § 1605A(a)(1)’s
    requirement that material support be provided ‘for’ the
    predicate act.” Sudan’s point is that the use of “for” with
    reference to “the provision of material support” indicates that
    the FSIA “requires a showing of intent” on the part of the
    foreign sovereign to achieve the predicate act, for which it
    refers us to Village of Hoffman Estates v. Flipside, Hoffman
    Estates, Inc., 
    455 U.S. 489
    , 502 (1982) (prohibition on selling
    merchandise “marketed for use” with illegal drugs requires a
    showing of intent on the defendant’s behalf). But see Posters
    ’N’ Things, Ltd. v. United States, 
    511 U.S. 513
    , 519 (1994)
    (prohibition in the same statute on selling a product “intended
    or designed for use” with illegal drugs looks only to the
    objective features of the product, not to a defendant’s intent).
    Under this reading, Sudan’s material support could not give
    rise to jurisdiction unless Sudan specifically intended its
    support to cause the embassy bombings.
    Although the record contains much evidence of Sudan’s
    support for al Qaeda and its general awareness of the group’s
    terrorist aims, nothing suggests that Sudan specifically knew of
    or intended its support to cause the embassy bombings.
    Nothing in the FSIA, however, requires a greater showing of
    intent than proximate cause. Indeed, we dispatched a similar
    argument in Kilburn, along with a hypothetical raised by the
    sovereign defendant:
    A terrorist organization is supported by two
    foreign states. One specifically instructs the
    77
    organization to carry out an attack against a U.S.
    citizen. Can the state which only provides
    general support, but was not involved with the
    act giving rise to the suit, also be stripped of its
    immunity?
    
    376 F.3d at 1128
    . Yes, we said. Because material support “is
    difficult to trace,” requiring more than proximate cause “could
    absolve” a state from liability when its actions significantly and
    foreseeably contributed to the predicate act. 
    Id.
    Further, we rejected the related argument that the
    “provision of material support or resources . . . for such an act”
    required that “a state’s material support must go directly for the
    specific act.” 
    Id. at 1130
    . That limitation, we explained, “would
    likely render § 1605(a)(7)’s material support provision
    ineffectual” because material support “is fungible” and
    “terrorist organizations can hardly be counted on to keep
    careful bookkeeping records.” Id. Indeed, in other situations,
    courts have required neither specific intent nor direct
    traceability to establish the liability of material supporters of
    terrorism. See Boim, 
    549 F.3d at 698
     (approving liability for
    donors to terrorist organizations whose donations were made
    for non-terrorism purposes). As Judge Posner has aptly said,
    “[t]o require proof that [a defendant] intended that his
    contribution be used for terrorism . . . would as a practical
    matter eliminate . . . liability except in cases in which the
    [defendant] was foolish enough to admit his true intent.” 
    Id. at 698-99
    . The same holds true for a state sponsor of terrorism
    under the FSIA; it may not avoid liability for supporting known
    terrorist groups by professing ignorance of their specific plans
    for attacks. In sum, that the evidence failed to show Sudan
    either specifically intended or directly advanced the 1998
    embassy bombings is irrelevant to proximate cause and
    jurisdictional causation.
    78
    *****
    In short, the plaintiffs have offered sufficient admissible
    evidence that establishes that Sudan’s material support of al
    Qaeda proximately caused the 1998 embassy bombings. The
    district court, therefore, correctly held the plaintiffs met their
    burden of production under the FSIA terrorism exception.
    Because Sudan failed to participate in the litigation, it did not
    rebut that its material support caused these extrajudicial
    killings. Therefore, this court has jurisdiction to hear claims
    against Sudan arising from the 1998 embassy bombings.
    IV.      Timeliness of Certain Claims
    The remainder of Sudan’s jurisdictional arguments apply
    only to certain groups of plaintiffs. Even if we rule for Sudan
    on all these matters, many of the judgments – and the district
    court’s 2011 holding on liability – will therefore remain intact.
    One such argument is that the claims of certain plaintiffs
    are barred by the statute of limitation in the FSIA, which Sudan
    views as a jurisdictional limit on the court’s power to hear a
    case. Like its predecessor, the current version of the FSIA
    terrorism exception contains a limitation period on personal
    injury claims against a state sponsor of terrorism. Application
    of the limitation period requires analysis of three components
    of the 2008 NDAA.
    The first is the limitation period itself. Codified at
    § 1605A(b), the FSIA provides that:
    An action may be brought or maintained under
    this section if the action is commenced, or a
    related action was commenced under section
    79
    1605(a)(7) . . . or [the Flatow Amendment] not
    later than the latter of (1) 10 years after April
    24, 1996; or (2) 10 years after the date on which
    the cause of action arose.
    The second component is § 1083(c)(3) of the 2008 NDAA,
    which defines the contours of a “related action” and imposes
    an additional time limitation on the filing of related actions:
    (3) RELATED ACTIONS. – If an action arising
    out of an act or incident has been timely
    commenced under section 1605(a)(7) . . . or [the
    Flatow Amendment], any other action arising
    out of the same act or incident may be brought
    under section 1605A . . . if the action is
    commenced not later than the latter of 60 days
    after – (A) the date of the entry of judgment in
    the original action; or (B) the date of the
    enactment of this Act.
    Finally, in addition to filing a new action or a “related
    action,” the NDAA offers a second way to avoid the limitation
    period if the plaintiff had previously brought a claim under
    § 1605(a)(7). Section 1083(c)(2) of the NDAA provides, in
    part:
    (2) PRIOR ACTIONS. – (A) IN GENERAL. –
    With respect to any action that – (i) was brought
    under section 1605(a)(7) of title 28, United
    States Code, or [the Flatow Amendment] before
    the date of enactment of this act . . . and . . . is
    before the courts in any form . . . that action, and
    any judgment in the action shall, on motion
    made by plaintiffs . . . be given effect as if the
    80
    action had originally been filed under section
    1605A(c).
    For these “prior actions” the NDAA removes the
    “defenses of res judicada, collateral estoppel, and [the]
    limitations period” if the plaintiff moved to convert his prior
    action or refiled a new action under § 1605A(c). NDAA
    § 1083(c)(2)(B). A new claim using § 1083(c)(2) is timely if it
    complies with the limitation period in § 1605A(b) or was filed
    within 60 days of enactment of the NDAA. Id. § 1083(c)(2)(C).
    Each provision comes into play in Sudan’s challenge to the
    timeliness of the plaintiffs’ actions. In this case, the plaintiffs’
    causes of action arose on August 7, 1998, the date of the
    embassy bombings. See Vine v. Republic of Iraq, 
    459 F. Supp. 2d 10
    , 21 (D.D.C. 2006) (holding a claim under the FSIA
    “arises on the date that the action in question occurred”), rev’d
    in part on another ground sub nom. Simon v. Republic of Iraq,
    
    529 F.3d 1187
    , 1194-95 (D.C. Cir. 2008) (describing an
    argument to the contrary as “rather strained”), rev’d on another
    ground sub nom. Republic of Iraq v. Beaty, 
    556 U.S. 848
    (2009). Therefore, unless the plaintiffs can identify a “related
    action . . . commenced under section 1605(a)(7)” or had
    brought a “prior action” that remained “before the courts in any
    form,” the last day to file a new action under § 1605A was
    August 7, 2008, ten years after the bombings.
    Sudan does not dispute that several of the plaintiffs have
    filed timely actions under § 1605A. The Owens plaintiffs filed
    their original action under § 1605(a)(7) in October 2001 and
    after passage of the NDAA timely moved to convert their prior
    action pursuant to § 1083(c)(2). Days before the statutory
    deadline, the Amduso and Wamai plaintiffs filed new actions
    under § 1605A, and the Osongo and Mwila plaintiffs filed suit
    81
    on the last possible day. Sudan does not challenge the
    timeliness of these plaintiffs.
    The Khaliq, Opati, and Aliganga plaintiffs are another
    story. The Khaliq plaintiffs filed a complaint in November
    2004 but missed the statutory deadline to convert that prior
    action under § 1083(c)(2) into a new action under § 1605A. See
    Khaliq v. Republic of Sudan, No. 1:04-cv-01536, at *3 (D.D.C.
    Sept. 9, 2009) (denying motion to convert under § 1083(c)(2)).
    Six months later, they filed a new case under § 1605A,
    asserting it was “related” both to their earlier suit and to the
    Owens, Mwila, and Amduso actions. The district court ordered
    briefing on whether the new suit was a “related action” within
    the scope of § 1083(c)(3) and ultimately allowed the case to
    proceed.
    After the court held the evidentiary hearing and made its
    findings on liability and well past August 2008, the Aliganga
    plaintiffs moved to intervene in the Owens action, which the
    district court allowed, holding their claims were “related” to
    the Owens action per § 1083(c)(3). The Opati plaintiffs joined
    last, filing a suit “related” to the Owens action under
    § 1083(c)(3) on July 24, 2012. The court allowed both the
    Aliganga and Opati plaintiffs the benefit of its earlier findings
    on liability and jurisdiction.
    Sudan challenges the timeliness of the Khaliq, Opati, and
    Aliganga plaintiffs, which raises two issues, only one of which
    we need to address on appeal. First, Sudan asserts that the
    limitation period in § 1605A(b) is jurisdictional and therefore
    bars a court from hearing any untimely action. Unless the
    limitation period in § 1605A(b) is jurisdictional, Sudan
    forfeited this affirmative defense by defaulting in the district
    court. See Practical Concepts, 
    811 F.2d at 1547
    . The plaintiffs
    argue that the time bar, like most statutes of limitation, is not
    82
    jurisdictional and hence is forfeit. See Day v. McDonough, 
    547 U.S. 198
    , 202 (2006) (“Ordinarily in civil litigation, a statutory
    time limitation is forfeited if not raised in a defendant’s answer
    or in an amendment thereto”).
    Assuming the limitation period is jurisdictional, Sudan
    contends the Khaliq, Opati, and Aliganga claims are barred
    because they are not “related actions” under § 1605A(b). A
    “related action,” Sudan urges, must be filed by the same
    plaintiff who had filed an earlier action under § 1605(a)(7),
    which the Opati and Aliganga plaintiffs did not do. We need
    not, however, decide what qualifies as a “related action”
    because we hold the limitation period in § 1605A(b) is not
    jurisdictional. As a consequence Sudan forfeited its limitation
    defense by defaulting in the district court. See Harris v. Sec’y,
    U.S. Dep’t of Veterans Affairs, 
    126 F.3d 339
    , 343 (D.C. Cir.
    1997).
    A line of recent Supreme Court cases has defined the
    circumstances in which a statute of limitation is jurisdictional.
    These cases uniformly recognize that a limitation period is not
    jurisdictional “unless it governs a court’s adjudicatory
    capacity, that is, its subject-matter or personal jurisdiction.”
    Henderson ex rel. Henderson v. Shinseki, 
    562 U.S. 428
    , 435
    (2011). To have a jurisdictional effect, a statute of limitation
    must “speak in jurisdictional terms,” that is, restrict “a court’s
    power” to hear a claim. United States v. Kwai Fun Wong, 
    135 S. Ct. 1625
    , 1633 (2015) (quoting Arbaugh v. Y & H Corp., 
    546 U.S. 500
    , 515 (2006)). Unless the Congress has “clearly stated”
    that it “imbued a procedural bar with jurisdictional
    consequences,” the bar does not have them. Id. at 1632
    (quoting Sebelius v. Auburn Reg’l Med. Ctr., 
    568 U.S. 145
    , 153
    (2013)) (internal quotation marks and alterations omitted).
    Thus has the Court “made plain that most time bars are
    nonjurisdictional.” 
    Id.
    83
    Of course, the Congress need not incant “magic words” in
    order clearly to demonstrate its intent. Henderson, 
    562 U.S. at 436
    . We look for the Congress’s intent in “the text, context,
    and relevant historical treatment of the provision at issue.”
    Musacchio v. United States, 
    136 S. Ct. 709
    , 717 (2016)
    (quoting Reed Elsevier, Inc. v. Muchnick, 
    559 U.S. 154
    , 166
    (2010) (internal quotation marks omitted)). Doing so shows
    that § 1605A(b) is not a limit on the court’s jurisdiction to hear
    an untimely FSIA claim.
    We begin, as we must, with the text of § 1605A(b), which
    we note does not appear to “speak in jurisdictional terms”:
    An action may be brought or maintained under
    this section . . . if commenced . . . [within] 10
    years after April 24, 1996; or 10 years after the
    date on which the cause of action arose.
    Nothing in the section refers to the “court’s power” to hear a
    case. Nothing in § 1605A(a) “conditions its jurisdictional grant
    on compliance with [the] statute of limitations” in § 1605A(b).
    Musacchio, 
    136 S. Ct. at 717
     (quoting Reed Elsevier, 
    559 U.S. at 165
    ). Indeed, § 1605A(b) “is less ‘jurisdictional’ in tone”
    than limitation periods held nonjurisdictional in prior cases.
    See Auburn Reg’l Med. Ctr., 
    568 U.S. at 154
     (comparing the
    permissive term “may” in one statute with the mandatory term
    “shall” in another but holding both were nonjurisdictional).
    The plain text alone is enough to render the limitation period in
    § 1605A(b) nonjurisdictional.
    Sudan nonetheless contends that the reference to “actions”
    rather than “claims” imbues the provision with jurisdictional
    import. For this proposition Sudan cites Spannaus v. U.S.
    Department of Justice, 
    824 F.2d 52
     (D.C. Cir. 1987), in which
    84
    we held a statute that similarly barred untimely “actions” was
    jurisdictional. See 
    28 U.S.C. § 2401
    (a). Sudan argues that by
    using the term “action” in § 1605A(b) the Congress made a
    clear statement replicating the jurisdictional reach of the
    similarly phrased statute at issue in Spannaus.
    This analogy has several problems. First, as the plaintiffs
    point out, Spannaus was decided nearly a decade before the
    Supreme Court erected the presumption against jurisdictional
    effect, see Carlisle v. United States, 
    517 U.S. 416
    , 434 (1996)
    (Ginsburg, J. concurring) (making the first reference to a
    presumption against jurisdictional effect), and the Congress
    enacted § 1605A after that presumption had been fully
    articulated, see Kontrick v. Ryan, 
    540 U.S. 443
    , 455 (2004)
    (criticizing the “less than meticulous” use of the term
    “jurisdictional” in earlier decisions). Therefore, Spannaus is
    unpersuasive on the matter. Second, the plaintiffs correctly
    note we did not rely upon the phrase “every civil action” in
    Spannaus to hold the limitation period in § 2401(a)
    jurisdictional. Rather, we relied upon longstanding precedent
    establishing that Ҥ 2401(a) is a jurisdictional condition
    attached to the government's waiver of sovereign immunity,
    and as such must be strictly construed.” 
    824 F.2d at
    55 (citing
    United States v. Mottaz, 
    476 U.S. 834
     (1986) and Soriano v.
    United States, 
    352 U.S. 270
    , 276 (1957)); cf. John R. Sand &
    Gravel Co. v. United States, 
    552 U.S. 130
    , 139 (2008) (holding
    a statute of limitation as jurisdictional when “[b]asic principles
    of stare decisis” required that outcome). In this case, precedent
    does not help Sudan because no court has given § 1605A(b) “a
    definitive earlier interpretation” that could displace the
    presumption against jurisdictional reach. Id. at 137-38.
    Further, Sudan’s invocation of the nostrum that identical
    words in similar statutes demand an identical construction finds
    little support in the most relevant precedents. See Wong, 135 S.
    85
    Ct. at 1629 (rejecting the argument that use of the phrase “shall
    forever be barred” rendered a limitation period jurisdictional
    despite the inclusion of the identical phrase in a jurisdictional
    statute of limitation). Therefore, the use of the term “action” in
    a provision held jurisdictional in Spannaus says little about
    whether a similarly phrased statute also has jurisdictional
    reach. Nor have courts attached jurisdictional significance to
    the word “action” in other statutes. See, e.g., Reed Elsevier, 
    559 U.S. at 166
     (holding nonjurisdictional 
    17 U.S.C. § 411
    (a),
    which bars any “civil action” for infringement without prior
    registration of the copyright); Hardin v. City Title & Escrow
    Co., 
    797 F.2d 1037
    , 1040 (D.C. Cir. 1986) (stating that 15
    U.S.C. § 15b, which bars “[a]ny [untimely] action to enforce
    any cause of action,” is “a good example of a non-jurisdictional
    time limitation”). Sudan presents no reason we should embrace
    Spannaus yet ignore these other precedents as well as the
    Supreme Court’s most recent guidance on statutory
    interpretation. Hence, we find no support for Sudan’s textual
    argument that § 1605A(b) is jurisdictional.
    Sudan next argues from the structure of the statute in
    which § 1605A(b) appears: Because the limitation period
    follows immediately after the grant of jurisdiction in
    § 1605A(a), it takes on the jurisdictional nature of the prior
    provision. Again, precedent suggests otherwise. As the
    plaintiffs note, the Supreme Court has held the “separation” of
    a time bar “from jurisdictional provisions” implies the
    limitation period is not jurisdictional. Gonzalez v. Thaler, 
    132 S. Ct. 641
    , 651 (2012); cf. Blueport Co., LLC v. United States,
    
    533 F.3d 1374
    , 1380 (Fed. Cir. 2008) (holding limits on patent
    infringement suits against the Government are jurisdictional
    because they appear in the same sentence as a general waiver
    of sovereign immunity). The limitation period in § 1605A(b)
    and the grant of jurisdiction in § 1605A(a) appear in two
    different subsections of the terrorism exception, only one of
    86
    which speaks in jurisdictional terms. The remaining
    subsections of § 1605A are plainly nonjurisdictional. See, e.g.,
    28 U.S.C. §§ 1605A(c) (private right of action), 1605A(d)
    (additional damages), 1605A(e) (use of special masters),
    1605A(g) (property disposition). That the limitation period
    follows immediately after the jurisdictional provisions of
    § 1605A(a) is of little import. See Gonzalez, 
    565 U.S. at 147
    (“Mere proximity will not turn a rule that speaks in
    nonjurisdictional terms into a jurisdictional hurdle”). If
    proximity alone were enough, then every subsection in a
    section containing a jurisdictional provision would, by the
    transitive property, also abut a jurisdictional subsection and
    therefore be jurisdictional as well, an absurd proposition.
    Auburn Reg’l Med. Ctr., 
    568 U.S. at 155
     (“A requirement we
    would otherwise classify as nonjurisdictional . . . does not
    become jurisdictional simply because it is placed in a section
    of a statute that also contains jurisdictional provisions”).
    Sudan also argues the history of § 1605A supports reading
    the time bar in § 1605A(b) as jurisdictional. Prior to the
    enactment of the 2008 NDAA, the FSIA terrorism exception
    under § 1605(a)(7) contained a similar time bar of ten years.
    See 
    28 U.S.C. § 1605
    (f) (2006). Sudan now contends that
    § 1605 was “undisputedly a purely jurisdictional statute,”
    rendering both the current and the former limitation periods
    jurisdictional as well.
    This argument mischaracterizes both old § 1605(f) and
    new § 1605A. The time bar in the former terrorism exception
    was in a separate subsection of the FSIA, § 1605(f), from the
    grant of jurisdiction over claims against a state sponsor of
    terrorism in § 1605(a)(7). Section § 1605 did have several
    jurisdictional provisions, see §§ 1605(a)(1)-(7), (b), (d), but
    each one expressly proclaimed its jurisdictional reach. See,
    e.g., 
    28 U.S.C. §§ 1605
    (a) (“A foreign state shall not be
    87
    immune from the jurisdiction of courts of the United States or
    of the States in any case” falling within one of the seven
    enumerated exceptions). The other four subsections of § 1605
    made no mention of jurisdiction. The difference is telling, but
    understandable as these provisions – much like those in
    § 1605A – defined terms (§ 1605(e)), limited discovery
    (§ 1605(g)), and governed the choice of law and the calculation
    of damages (§ 1605(c)), among other things, none of which
    could have jurisdictional effect. As in § 1605A, § 1605
    demonstrates that when the Congress intends to make a
    provision jurisdictional, it normally does so expressly. When
    words of jurisdictional import are absent, so too, we presume,
    is jurisdictional effect.
    Sudan lastly argues that waivers of sovereign immunity
    must be strictly construed. See Spannaus, 
    824 F.2d at 55
    . But
    see Scarborough v. Principi, 
    541 U.S. 401
    , 421 (2004)
    (“[L]imitations principles should generally apply to the
    Government ‘in the same way that’ they apply to private
    parties”) (quoting Franconia Assocs. v. United States, 
    536 U.S. 129
    , 145 (2002)). The Supreme Court has twice addressed this
    very point and rejected it for time bars that conditioned waivers
    of the U.S. Government’s sovereign immunity. Irwin v. Dep’t
    of Veterans Affairs, 
    498 U.S. 89
    , 94-96 (1990); Wong, 
    135 S. Ct. at 1636
    . Treating a time bar as nonjurisdictional, the Court
    has said, “is likely to be a realistic assessment of legislative
    intent” and “amounts to little, if any, broadening of the
    congressional waiver” of sovereign immunity. Irwin, 498 U.S.
    at 95. Therefore, Sudan’s argument that sovereignty gives
    jurisdictional import to the limitation period in the FSIA
    terrorism exception is unpersuasive.
    In any event, Sudan misses the distinction between a
    waiver of sovereign immunity and an exception to the statutory
    grant of foreign sovereign immunity. The Congress “did not
    88
    waive [a foreign state’s] sovereign immunity in enacting [the
    FSIA terrorism exception]” because “only the sovereign can
    forswear the sovereign’s legal rights.” Simon, 
    529 F.3d at 1196
    .
    Rather, “[i]n the terrorism exception the Congress qualified the
    statutory grant of immunity to [foreign sovereigns],” which is
    “itself ‘a matter of grace and comity.’” 
    Id.
     (quoting Verlinden,
    
    461 U.S. at 486
    ). Because the FSIA exceptions are not waivers
    of sovereign immunity, the rule of strict construction does not
    apply.
    Having reviewed the text, structure, or history of the FSIA
    terrorism exception, we see “no authority suggesting the
    Congress intended courts to read [§ 1605A(b)] any more
    narrowly than its terms suggest.” Id. Sudan’s arguments to the
    contrary fail. We therefore hold that the limitation period in
    § 1605A(b) is not jurisdictional. It follows that Sudan has
    forfeited its affirmative defense to the Khaliq, Opati, and
    Aliganga actions by failing to raise it in the district court. See
    Musacchio, 
    136 S. Ct. at 717
    ; Harris, 
    126 F.3d at 343
    . As a
    consequence, we have no need to consider Sudan’s
    interpretation of a “related action” under NDAA § 1083(c)(3).
    V.   Jurisdiction and Causes of Action for Claims of Third
    Parties
    Sudan next takes aim at claims brought under state and
    federal law by the family members of those killed or injured in
    the embassy bombings. First, Sudan contends § 1605A(a) does
    not grant the court jurisdiction to hear a claim from a plaintiff
    (or the legal representative of a plaintiff) who was not
    physically injured by a terrorist attack. Second, even if
    jurisdiction is proper, Sudan argues the federal cause of action
    in § 1605A(c) supplies the exclusive remedy for a FSIA
    claimant, precluding claims under state law. Finally, Sudan
    insists a family member who was not present at the scene of the
    89
    embassy bombings cannot state a claim for intentional
    infliction of emotional distress (IIED) under District of
    Columbia law.
    A. Jurisdiction
    We turn first to Sudan’s jurisdictional argument, which we
    are obliged to address notwithstanding Sudan’s default. The
    plaintiffs in this case have brought two different types of claims
    under various sources of law. First are the claims of those
    physically injured by the embassy bombings or by the legal
    representatives of those now deceased or incapacitated. Second
    are the claims of family members of those physically injured or
    killed by the bombings who seek damages for their emotional
    distress. Sudan contends the FSIA extends jurisdiction only to
    members of the first group and their legal representatives. The
    claims of family members for emotional distress, it argues, are
    outside the jurisdiction conferred upon the court.
    Sudan’s argument turns upon the meaning of the phrase
    “the claimant or the victim” in § 1605A(a)(2)(A)(ii). Section
    1605A(a) gives the court jurisdiction and withdraws immunity
    only when “the claimant or the victim” falls within one of four
    categories: U.S. nationals, members of the armed forces, and
    employees or contractors of the United States acting within the
    scope of their employment. A separate subsection of the
    terrorism exception provides a federal cause of action to the
    same groups of plaintiffs and their legal representatives. 28
    U.S.C. § 1605A(c).
    Sudan     contends       that    “the      claimant”      in
    § 1605A(a)(2)(A)(ii) refers only to the legal representative of a
    victim of a terrorist attack. This would effectively align the
    grant of jurisdiction with the federal cause of action under
    § 1605A(c). That is, under Sudan’s proffered interpretation, a
    90
    court would have jurisdiction only over claims brought by
    persons who could invoke the federal cause of action in
    § 1605A(c). Applied to the case at hand, this might preclude
    jurisdiction over a claim for emotional distress brought by a
    relative of someone killed or injured by the embassy bombings
    because a family member is arguably neither a victim of the
    attack nor the legal representative of a victim.
    Sudan’s argument has several problems. First and
    foremost, Sudan’s interpretation is inconsistent with the plain
    meaning and the structure of the statute, as is clear from the
    differences between the grant of jurisdiction in § 1605A(a) and
    the cause of action in § 1605A(c). Section 1605A(a)(2) grants
    jurisdiction when “the claimant or the victim” is a member of
    one of the four enumerated groups. In contrast, § 1605A(c)
    authorizes a cause of action not only for those four groups but
    also for the legal representative of a member of those groups.
    If the Congress had intended § 1605A(a)(2) to mirror the scope
    of § 1605A(c), then it would have used the same term – “legal
    representative” – in both subsections (i.e., “the legal
    representative or the victim”), as it did with the verbatim
    enumeration of the four qualifying groups. That it did not
    signals its intent to give the term “claimant” in § 1605A(a)(2)
    a meaning different from and broader than “the legal
    representative” in § 1605A(c). See Russello v. United States,
    
    464 U.S. 16
    , 23 (1983).
    What, then, does the FSIA mean by the terms “claimant”
    and “legal representative”? The plain meaning of claimant, the
    plaintiffs correctly note, is simply someone who brings a claim
    for relief. Who can be a claimant is typically defined by the
    substantive law under which a plaintiff states a claim. By
    contrast, the term “legal representative” contemplates a far
    narrower universe of persons based upon principles of agency
    or a special relationship, such as marriage. See, e.g., Fed.
    91
    Treasury Enter. Sojuzplodoimport v. SPI Spirits Ltd., 
    726 F.3d 62
    , 80 (2d Cir. 2013) (“In its broadest usage, the phrase ‘legal
    representative’ may refer simply to ‘[o]ne who stands for or
    acts on behalf of another’”). Federal and state procedural law,
    not the substantive law under which a plaintiff states a claim,
    typically defines who may serve as a legal representative in a
    given suit. See FED. R. CIV. P. 17(b)(3); Gurley v. Lindsley, 
    459 F.2d 268
    , 279 (5th Cir. 1972) (applying Texas law in accord
    with Rule 17(b)). Thus, a legal representative is a special type
    of claimant who proceeds on behalf of an absent party with a
    substantive legal right.
    Sudan nonetheless offers three reasons we should
    narrowly interpret “claimant” to mean no more than “legal
    representative.” First, Sudan argues that interpreting
    “claimant” to mean “legal representative” is necessary to
    “harmonize[]” the scope of jurisdiction under § 1605A(a) with
    the cause of action under § 1605A(c). If the terms had different
    meanings, Sudan warns, then “certain plaintiffs [could]
    establish jurisdiction under § 1605A(a)” but anomalously
    could not “avail[] themselves of the private right of action in
    § 1605A(c).” Here Sudan is assuming a grant of jurisdiction
    must be no broader than the causes of action that may be
    brought under it. But that does not follow. Cf. FDIC v. Meyer,
    
    510 U.S. 471
    , 484 (1994) (noting that “whether there has been
    a waiver of sovereign immunity” and “whether the source of
    substantive law” “provides an avenue for relief” are “two
    ‘analytically distinct’ inquiries”). The other exceptions to
    sovereign immunity in the FSIA exemplify this distinction
    because they grant the courts jurisdiction over claims against
    foreign sovereigns but neither create nor withdraw substantive
    causes of action for FSIA plaintiffs. See Helmerich & Payne,
    
    137 S. Ct. at 1324
     (“Indeed, cases in which the jurisdictional
    inquiry does not overlap with the elements of a plaintiff’s
    92
    claims have been the norm in cases arising under other
    exceptions to the FSIA”).
    Furthermore, even under the prior terrorism exception, the
    Congress authorized a cause of action – in the Flatow
    Amendment – with a narrower reach than the grant of
    jurisdiction in § 1605(a)(7). See Leibovitch v. Islamic Republic
    of Iran, 
    697 F.3d 561
    , 570-71 (7th Cir. 2012). That the Flatow
    Amendment applied only to state officials, not foreign states,
    took “nothing away from” the grant of jurisdiction under
    § 1605(a)(7) because the broader jurisdictional provision
    operated independently of the narrower cause of action. See
    Cicippio-Puleo, 
    353 F.3d at 1035-36
    . Accordingly, we
    declined to “harmonize” the broad grant of jurisdiction in the
    old terrorism exception with the narrower cause of action
    provided by the Flatow Amendment because doing so would
    have conflicted with the text of both provisions. 
    Id. at 1032-33
    .
    So too here. Again the Congress has authorized a narrower
    cause of action, § 1605A(c), correlative to a broader
    jurisdictional grant, § 1605A(a), and as before, we see no
    reason to distort the plain meaning of either provision in order
    to make them coextensive.
    Second, Sudan contends a broad interpretation of
    “claimant” would “render[] the term ‘victim’ superfluous.” Not
    so; as the plaintiffs note, the use of both terms affords
    jurisdiction when “either the claimant or the victim is a national
    of the United States” or is within one of the other three groups
    identified in the statute. La Reunion Aerienne v. Socialist
    People’s Libyan Arab Jamahiriya, 
    533 F.3d 837
    , 844 (D.C.
    Cir. 2008).
    Third, Sudan argues that reading “claimant” to mean “one
    who brings a claim” would “greatly expand[] the universe of
    possible plaintiffs, contrary to Congressional intent.” The term
    93
    “claimant,” unlike the term “victim,” is indeed less bounded by
    the underlying acts that give the courts jurisdiction: Only a
    limited set of individuals could properly be considered victims
    of the 1998 embassy bombings, whereas the term “claimant”
    may appear to encompass a larger universe of possible
    plaintiffs. That universe is actually quite limited, however. The
    FSIA itself limits claimants to those seeking “money damages”
    “for personal injury or death,” 28 U.S.C. § 1605A(a)(1). See La
    Reunion Aerienne, 533 F.3d at 845 (allowing an insurer to
    recover payments made to survivors and to estates of those
    killed in an airline bombing because the insureds’ claims were
    “personal injury claim[s] under traditional common-law
    principles”) (internal quotation marks, emphasis, and citation
    removed).
    Substantive law also limits who is a proper claimant under
    the FSIA. This is clearly the case with the federal cause of
    action in the FSIA, which limits claimants to the four
    enumerated groups and their legal representatives. So too with
    substantive law outside the FSIA: We have held the common-
    law tort of IIED limits recovery to the immediate family of a
    victim who is physically injured or killed. See Bettis v. Islamic
    Republic of Iran, 
    315 F.3d 325
    , 338 (D.C. Cir. 2003) (rejecting
    claims for IIED brought by nieces and nephews of a U.S.
    national taken hostage); RESTATEMENT (SECOND) OF TORTS
    § 46 (1965). Therefore, not every person who experiences
    emotional distress from a major terrorist attack – a universe that
    could be large indeed – can state a claim for IIED absent some
    close relationship to a victim who was injured or killed.
    Therefore, due to the limitations imposed upon potential
    claimants both by the FSIA and by substantive law, we are not
    persuaded by Sudan’s argument that the plain meaning of
    “claimant” produces “absurd results” or is “contrary to
    Congressional intent.”
    94
    In sum, by its plain text, the FSIA terrorism exception
    grants a court jurisdiction to hear a claim brought by a third-
    party claimant who is not the legal representative of a victim
    physically injured by a terrorist attack. Who in particular may
    bring a claim against a foreign sovereign is a question of
    substantive law, wholly separate from the question of our
    jurisdiction.
    B. Causes of Action
    Sudan next contends the foreign family members cannot
    state a claim under any source of substantive law. Starting from
    first principles, we reiterate that the question whether a statute
    withdraws sovereign immunity is “analytically distinct” from
    whether a plaintiff has a cause of action. See Meyer, 
    510 U.S. at 484
    ; United States v. Mitchell, 
    463 U.S. 206
    , 218 (1983). As
    the district court correctly recognized, we have never required
    the Congress, in order to effectuate a grant of jurisdiction,
    expressly to “define the substantive law that applies.” Owens
    V, 174 F. Supp. 3d at 286. Indeed, before enactment of the
    FSIA, the courts – absent objection by the State Department –
    had jurisdiction to hear suits against a foreign government
    under state and federal law even though no statute provided
    rules of decision for such cases. See, e.g., Victory Transp. Inc.
    v. Comisaria Gen. de Abastecimientos y Transportes, 
    336 F.2d 354
     (2d Cir. 1964) (enforcing a state-law arbitration agreement
    against a foreign sovereign via the Federal Arbitration Act).
    Hence, unless the enactment of the FSIA or of § 1605A
    somehow changed this situation, a plaintiff proceeding under
    the FSIA may rely upon alternative sources of substantive law,
    including state law.
    Sudan would have us find an abrogation of a plaintiff’s
    access to state law in § 1606 of the FSIA, which provides in
    relevant part:
    95
    As to any claim for relief with respect to which
    a foreign state is not entitled to immunity under
    section 1605 or 1607 of this chapter, the foreign
    state shall be liable in the same manner and to
    the same extent as a private individual under
    like circumstances; but a foreign state except for
    an agency or instrumentality thereof shall not be
    liable for punitive damages.
    When the original FSIA terrorism exception was in force,
    § 1606 governed what a claimant could recover from a foreign
    sovereign. This was because the original exception was
    codified as a subsection of § 1605, to which § 1606 expressly
    applied. After we declined in Cicippio-Puleo to infer a federal
    cause of action against a foreign sovereign arising from
    § 1605(a)(7) or from the Flatow Amendment, a plaintiff using
    the old terrorism exception could press a claim under state law,
    as qualified by § 1606, in the same manner as any other FSIA
    plaintiff. When the Congress passed the 2008 NDAA, it
    repealed old § 1605(a)(7) and codified the current terrorism
    exception in new § 1605A. As a result, § 1606, which
    references only § 1605 and § 1607, does not apply to the
    current FSIA terrorism exception. This, Sudan contends,
    demonstrates the Congress’s intent to foreclose a plaintiff from
    relying upon state law when suing under § 1605A. Essentially,
    Sudan suggests the Congress struck a deal when it recodified
    the new terrorism exception in § 1605A: A plaintiff could sue
    under the new federal cause of action but could no longer press
    a state-law claim against a foreign sovereign via the pass-
    through process endorsed by Cicippio-Puleo. Therefore,
    according to Sudan, plaintiffs who are ineligible for the
    purportedly exclusive remedy of the federal cause of action –
    including the foreign family members in this case – were left
    without a “gateway” to any substantive law under which to
    96
    state a claim. Contra Leibovitch, 697 F.3d at 572 (“Although
    § 1605A created a new cause of action, it did not displace a
    claimant's ability to pursue claims under applicable state or
    foreign law upon the waiver of sovereign immunity” (quoting
    Estate of Doe v. Islamic Republic of Iran, 
    808 F. Supp. 2d 1
    ,
    20 (D.D.C. 2011)).
    One might wonder, as the plaintiffs do, why we need to
    reach this nonjurisdictional argument, which Sudan forfeited
    by failing to appear in the district court. See Practical
    Concepts, 
    811 F.2d at 1547
    . We do so because we have
    discretion to reach the question, see Acree, 
    370 F.3d at 58
    , and
    this case presents sound reasons for doing so. The question
    presented is “purely one of law important in the administration
    of federal justice” because most cases invoking the terrorism
    exception are filed in this circuit, see 
    28 U.S.C. § 1391
    (f)(4),
    and “resolution of the issue does not depend on any additional
    facts not considered by the district court.” Acree, 
    370 F.3d at 58
     (quoting Roosevelt v. E.I. Du Pont de Nemours & Co., 
    958 F.2d 416
    , 419 n.5 (D.C. Cir. 1992)). Review is particularly
    appropriate here because the foreign family member plaintiffs
    have secured billions in damages against a foreign sovereign.
    See 
    id.
     (finding extraordinary circumstances from a “nearly-
    billion dollar default judgment against a foreign government”).
    We therefore exercise our discretion to consider Sudan’s
    nonjurisdictional argument that the pass-through approach
    recognized in Cicippio-Puleo did not survive enactment of
    § 1605A.
    In our view, Sudan assigns undue significance to § 1606.
    On its face, that section does not authorize a plaintiff to resort
    to state (or federal or foreign) law in a suit against a foreign
    sovereign. Nor does it create a substantive body of law for such
    an action. See First Nat’l City Bank, 
    462 U.S. at 620-21
    .
    Rather, as the plaintiffs argue and the district court recognized,
    97
    § 1606 simply limits the liability of a foreign state to “the same
    manner and to the same extent as a private individual under like
    circumstances” regardless of what substantive law is being
    applied. The exclusion of punitive damages from the pass-
    through approach reinforces our confidence that § 1606
    operates only to limit, not to create, the liability of a foreign
    state. As the Supreme Court has said, the Congress made clear
    that the FSIA, including § 1606, was not “intended to affect the
    substantive law of liability” applicable to a foreign sovereign.
    Id. at 620 (quoting H.R. REP. NO. 94-1487, at 12 (1976)). In
    keeping with this straightforward reading, we have recognized
    that § 1606 does not authorize a court to craft federal common
    law, but rather requires it to apply state law to suits under the
    FSIA. See Bettis, 
    315 F.3d at 333
     (noting that § 1606 “instructs
    federal judges to find the relevant law, not to make it”).
    One might wonder, then, why the Congress moved the
    FSIA terrorism exception from § 1605, where it was covered
    by § 1606, to § 1605A, where it is not. Contrary to Sudan’s
    convoluted argument about an implied withdrawal of remedies
    under state law, the new exception itself provides a ready
    answer. If the Congress had reenacted the new terrorism
    exception in the same section as the old one, then it would have
    created an irreconcilable conflict between the new federal
    cause of action, which allows the award of punitive damages,
    and § 1606, which prohibits them. In order to avoid this
    conflict, a court would have either to disregard a central
    element of the federal cause of action or to hold the new
    exception implicitly repealed § 1606 as applied to state
    sponsors of terror. See Morton v. Mancari, 
    417 U.S. 535
    , 549
    (1974) (noting the “cardinal rule . . . that repeals by implication
    are not favored”) (internal quotation marks removed).
    Avoiding a conflict between § 1605 and § 1606, rather than
    Sudan’s strained “gateway” argument, more likely explains the
    98
    Congress’s purpose in moving the terrorism exception out of
    § 1605.
    Of course, in most cases brought under the new terrorism
    exception, the plaintiff need not rely upon state tort law. This
    does not, however, imply that the Congress intended to
    foreclose access to state law by those who need it, as do foreign
    family members. U.S. nationals will continue to sue under
    § 1605A(c) and benefit from its consistent application. But the
    pass-through approach remains viable to effectuate the intent
    of the Congress to secure recoveries for other plaintiffs harmed
    by a terrorist attack.
    C. Intentional Infliction of Emotional Distress
    We turn now to Sudan’s third and final argument
    respecting family members who have brought state-law claims
    for IIED. The district court held that District of Columbia law
    controls these actions, Owens IV, 
    826 F. Supp. 2d at 157
    , which
    Sudan does not contest. Judgments under D.C. law in favor of
    the foreign family member plaintiffs total more than $7 billion.
    Sudan contends these awards are invalid because D.C. tort law
    requires a plaintiff to be present at the scene of a defendant’s
    outrageous and extreme conduct in order to recover for IIED.
    In particular, Sudan points to Pitt v. District of Columbia, in
    which this court applied the “presence” requirement to bar a
    claim for IIED under D.C. law. 
    491 F.3d 494
    , 507 (D.C. Cir.
    2007).
    That case does not extend as far as Sudan contends. In Pitt,
    we noted “[t]he District of Columbia has adopted the standard
    for intentional infliction of emotional distress from the
    Restatement (Second) of Torts.” 
    Id.
     (citing Sere v. Grp.
    Hospitalization, Inc., 
    443 A.2d 33
    , 37 (D.C. 1982). As Sudan
    99
    points out, the Second Restatement contains a presence
    requirement:
    Where such [extreme and outrageous] conduct
    is directed at a third person, the actor is subject
    to liability if he intentionally or recklessly
    causes severe emotional distress (a) to a
    member of such person's immediate family who
    is present at the time, whether or not such
    distress results in bodily harm, or (b) to any
    other person who is present at the time, if such
    distress results in bodily harm.”
    The Restatement, however, also provides that “there may
    . . . be other circumstances under which the actor may be
    subject to liability for the intentional or reckless infliction of
    emotional distress.” RESTATEMENT (SECOND) OF TORTS § 46
    (1965) (caveat). A comment to the Restatement expressly
    applies this caveat to the presence requirement, “leav[ing] open
    the possibility of situations in which presence at the time may
    not be required.” Id. cmt. l. 6
    Although we did apply the presence requirement in Pitt,
    the factual situation there was quite different than in the present
    case. The plaintiff in Pitt alleged emotional distress from the
    “filing of a false and misleading affidavit and possible evidence
    tampering.” 
    491 F.3d at 507
    . Allowing a claim for IIED
    6
    Several district courts have applied this exception to claims for
    emotional distress under the federal cause of action in the new FSIA
    terrorism exception. See, e.g., Estate of Heiser v. Islamic Republic of
    Iran, 
    659 F. Supp. 2d 20
    , 26-27 (D.D.C. 2009) (“All acts of terrorism
    are by their very definition extreme and outrageous and intended to
    cause the highest degree of emotional distress, literally, terror, in
    their targeted audience”) (quoting Stethem v. Islamic Republic of
    Iran, 
    201 F. Supp. 2d 78
    , 89 (D.D.C. 2002)).
    100
    stemming from a procedural irregularity in law enforcement,
    we reasoned, would “substantially expand[] the scope of the
    third-party IIED tort under District of Columbia law,” 
    id.,
    without any principled limitation on future actions. In contrast,
    a massive terrorist attack resulting in widespread casualties and
    worldwide attention would appear so exceptional that
    recognizing an appropriate plaintiff’s claim for IIED would not
    broaden the scope of liability to innumerable similar incidents.
    Therefore, nothing in Pitt suggests D.C. law would apply the
    presence requirement to an act of international terrorism.
    At the same time, we proceed with caution when applying
    D.C. tort law to this novel situation. The District of Columbia
    has yet to decide whether it would apply the presence
    requirement or the exception in the Restatement to an act of
    international terrorism. Neither has Maryland, the common law
    of which is authoritative when D.C. law is silent. Clark v.
    Route, 
    951 A.2d 757
    , 763 n.5 (D.C. 2008). Although there are
    convincing reasons to do so, there are also good reasons to
    draw back. Some of the first cases applying the caveat in the
    Restatement dealt with hostage taking. See, e.g., Stethem, 
    201 F. Supp. 2d at 89-91
    ; Sutherland v. Islamic Republic of Iran,
    
    151 F. Supp. 2d 27
    , 50 (D.D.C. 2001). Hostage takers often
    target the family members of the victim, demanding they pay a
    ransom for the release of the hostage. The emotional distress of
    the family member is intended to advance the hostage taker’s
    aims. Therefore, hostage taking seems to be the type of case in
    which the defendant’s extreme and outrageous conduct is
    “directed at a third person” but is intended also to cause severe
    emotional distress to the absent plaintiff. See DAN B. DOBBS,
    THE LAW OF TORTS § 307, at 384 (2000) (“If the defendants’
    conduct is sufficiently outrageous and intended to inflict severe
    emotional harm upon a person which [sic] is not present, no
    essential reason of logic or policy prevents liability”). If so, the
    plaintiff’s contemporaneous physical presence is not required
    101
    because the plaintiff is the direct target of the tortious conduct,
    rather than a mere bystander, as the latest version of the
    Restatement recognizes. See RESTATEMENT (THIRD) OF TORTS:
    PHYS. & EMOT. HARM § 46 (2012) (cmt. m) (“If an actor harms
    someone for the purpose of inflicting mental distress on
    another person, the [presence] limitations . . . do not apply”).
    In contrast, a terrorist bombing is not so precisely targeted
    at certain absent individuals. Rather than leveraging distress
    inflicted upon specific third parties to achieve their aims,
    terrorist bombings typically target the public at large in order
    to create a general environment of fear and insecurity.
    Widespread distress, rather than distress “directed at” or
    confined to particular persons, provides a considerably weaker
    basis for IIED liability. Indeed, the Second Restatement would
    preclude an individual’s recovery for an event causing
    widespread emotional distress, absent some unique,
    foreseeable, and intended harm to the plaintiff. RESTATEMENT
    (SECOND) OF TORTS § 46 cmt. l. For this reason too, the drafters
    of the Third Restatement of Torts have criticized several
    district court decisions for abandoning the presence
    requirement in FSIA terrorism cases. See RESTATEMENT
    (THIRD) OF TORTS: PHYS. & EMOT. HARM § 46 (2012)
    reporter’s note cmt. m (criticizing the “questionable
    determination that the terrorists acts were directed not only to
    the victims of the attack but also at their family members”).
    Although we have not decided the matter, we too have
    expressed skepticism that the sensational nature of a terrorist
    attack warrants an exception to the limitations of IIED in the
    Restatement. See Bettis, 
    315 F.3d at 334
     (“If any person that
    Iran hoped to distress . . . could recover under section 46(1) as
    a direct victim of Iran's conduct, virtually anyone claiming he
    or she was affected could recover”).
    102
    We believe a court may reasonably characterize a terrorist
    bombing as falling either within the caveat in the Second
    Restatement or beyond the scope of a sovereign’s liability to
    third parties. The plaintiffs once again urge us not to reach this
    nonjurisdictional question forfeited by Sudan’s default, but as
    with the availability of state law claims, we see sound reasons
    for exercising our discretion to consider the matter. See Acree,
    
    370 F.3d at 58
    . Billions of dollars have been awarded to foreign
    family members as damages for IIED. Furthermore, how to
    apply the Restatement to terrorist bombings is a question,
    unfortunately, almost certain to recur in this Circuit. Finally,
    this is a pure question of law that “does not depend on any
    additional facts not considered by the district court,” Roosevelt,
    
    958 F.2d at
    419 & n.5, and potentially may bear upon sensitive
    matters of international relations. Cf. Acree, 
    370 F.3d at 58
    .
    The situation therefore presents “exceptional circumstances”
    sufficient to overcome our ordinary reluctance to hear
    nonjurisdictional arguments not raised before the district court.
    
    Id.
    That said, the choice is not ours to make. District of
    Columbia law controls the scope of IIED liability, and the D.C.
    Court of Appeals has yet to render a decision on the matter.
    Therefore, we shall certify the question to that court pursuant
    to 
    D.C. Code Ann. § 11-723
    . Whether to certify a question
    “rests in the sound discretion of the federal court.” Lehman
    Bros. v. Schein, 
    416 U.S. 386
    , 390-91 (1974). “The most
    important consideration guiding the exercise of this discretion
    . . . is whether the reviewing court finds itself genuinely
    uncertain about a question of state law that is vital to a correct
    disposition of the case before it.” Tidler v. Eli Lilly & Co., 
    851 F.2d 418
    , 426 (D.C. Cir. 1988).
    This case presents such a question. We are genuinely
    uncertain whether the D.C. Court of Appeals would apply the
    103
    presence requirement in the Second Restatement of Torts to
    preclude recovery for IIED by family members absent from the
    scene of a terrorist bombing. Other states have reached
    different conclusions on this question. See Peterson, 
    515 F. Supp. 2d at
    43-44 & n.19 (identifying Florida, California, and
    Vermont as states that apply the presence requirement and
    Louisiana, and Pennsylvania as states that do not).
    Furthermore, the question is one of significant public
    interest in the District of Columbia. See Eli Lilly & Co. v. Home
    Ins. Co., 
    764 F.2d 876
    , 884 (D.C. Cir. 1985). Because the great
    majority of claims under the FSIA terrorist exception are
    brought in the federal district court in D.C. pursuant to the
    FSIA venue provision in 28 U.S.C. 1391(f)(4), this question of
    D.C. tort law will likely arise in future cases before our district
    court. And the District, as the home of thousands of
    government employees, military service members, and
    contractors, and as itself a potential target of terrorist attacks,
    has a substantial interest in determining who may recover for
    the emotional distress caused by a terrorist attack.
    We therefore certify the following question to the D.C.
    Court of Appeals:
    Must a claimant alleging emotional distress
    arising from a terrorist attack that killed or
    injured a family member have been present at
    the scene of the attack in order to state a claim
    for intentional infliction of emotional distress?
    VI.      Punitive Damages
    Having affirmed that the district court properly asserted
    jurisdiction over the plaintiffs’ claims and held Sudan liable for
    their injuries, we now review the amount in damages it
    104
    awarded to the plaintiffs. The court awarded $10.2 billion in
    damages, including more than $4.3 billion in punitive damages
    under both state and federal law. See, e.g., Opati, 60 F. Supp.
    3d at 81-82. In post-judgment motions under Rule 60(b)(6),
    Sudan asked the district court to vacate the awards of punitive
    damages. The court declined, reasoning that any
    nonjurisdictional legal error in assessing punitive damages
    against Sudan did not present an “extraordinary circumstance”
    that would justify vacatur. Owens V, 174 F. Supp. 3d at 288;
    see Gonzalez v. Crosby, 
    545 U.S. 524
    , 536 (2005) (“[R]elief
    under Rule 60(b)(6) . . . requires a showing of ‘extraordinary
    circumstances’”).
    Sudan’s renewed request to vacate these awards is now
    before us both on appeal from the denial of Sudan’s Rule 60(b)
    motions and on direct appeal from the final judgments. Sudan
    principally contends the FSIA terrorism exception does not
    retroactively authorize the imposition of punitive damages
    against a sovereign for conduct occurring before the passage of
    § 1605A. As explained below, we agree. But before reaching
    the merits, we first explain why we are addressing the matter
    despite Sudan’s default in the district court.
    A. Whether to Review the Awards of Punitive Damages
    The plaintiffs contend, and the district court agreed, we
    need not consider Sudan’s argument against the awards of
    punitive damages because it forfeited this nonjurisdictional
    challenge by failing to appear in the district court. While this is
    true, see Practical Concepts, 
    811 F.2d at 1547
    , there are sound
    reasons to exercise our discretion to hear Sudan’s argument,
    whether under Rule 60(b) or on direct appeal.
    First, Supreme Court precedent generally favors more
    searching appellate review of punitive damages than of other
    105
    nonjurisdictional matters. See Pac. Mut. Life Ins. v. Haslip, 
    499 U.S. 1
    , 18 (1991) (warning against “unlimited judicial
    discretion” in fixing punitive damages). Heightened scrutiny is
    appropriate because punitive damages are in the nature of
    criminal punishment. 
    Id. at 19
    . Accordingly, the Court has
    closely reviewed the size of punitive damage awards relative to
    compensatory damages, State Farm Mut. Auto. Ins. v.
    Campbell, 
    538 U.S. 408
    , 426 (2003), the availability of
    punitive damages for conduct occurring outside a court’s
    territorial jurisdiction, BMW of N. Am., Inc. v. Gore, 
    517 U.S. 559
    , 572 (1996), and the factors a court may consider in
    imposing punitive damages, Haslip, 
    499 U.S. at 21-22
    . In
    particular, the Court has emphasized the importance of judicial
    review to ensure awards of punitive damages comport with the
    Constitution. Honda Motor Co. v. Oberg, 
    512 U.S. 415
    , 432
    (1994). Consistent with these concerns, the scope of appellate
    review for a timely challenge to an award of punitive damages
    is broad. See Cooper Indus., Inc. v. Leatherman Tool Grp., Inc.,
    
    532 U.S. 424
    , 436 (2001) (reviewing de novo constitutional
    challenges to punitive damages). We think the same concerns
    call for a similarly exacting standard for review of an untimely
    challenge to an award of punitive damages. Our view is
    reinforced by the Court’s warning that the “[r]etroactive
    imposition of punitive damages would raise a serious
    constitutional question.” Landgraf v. USI Film Prods., 
    511 U.S. 244
    , 281 (1994). 7
    7
    These circumstances distinguish the review of retroactive punitive
    damages from the review of Sudan’s forfeited limitations defense.
    See Musacchio, 
    136 S. Ct. at 717
     (“[A] limitations bar . . . is a
    defense that becomes part of a case only if the defendant presses it in
    the district court”); Day, 
    547 U.S. at 202
     (“Ordinarily in civil
    litigation, a statutory time limitation is forfeited if not raised in a
    defendant’s answer or in an amendment thereto”).
    106
    In order to avoid possible constitutional infirmities, other
    Circuits too have reviewed denials of Rule 60(b)(6) motions to
    vacate punitive damages awarded in default judgments. See
    Watkins v. Lundell, 
    169 F.3d 540
    , 545 (8th Cir. 1999); Merrill
    Lynch Mortg. Corp. v. Narayan, 
    908 F.2d 246
    , 253 (7th Cir.
    1990). Although review of punitive damages entered upon
    default is not always warranted, we think the circumstances of
    this case merit appellate review. Of particular note are the size
    of the awards (totaling $4.3 billion), the presentation of a novel
    question of constitutional law (retroactivity), and the potential
    effect on U.S. diplomacy and foreign relations. We believe
    these factors present the “extraordinary circumstances” needed
    for review under Rule 60(b)(6). 8
    This issue also comes before the court on direct appeal
    from the default judgments. As previously mentioned, we may
    consider nonjurisdictional questions not raised by the parties
    on direct appeal in “exceptional circumstances.” Acree, 
    370 F.3d at 58
    . Our discretion is properly exercised over pure
    questions of law – such as the retroactivity of punitive damages
    8
    The circumstances of this case also distinguish it from Bankers Life
    & Casualty Co. v. Crenshaw, 
    486 U.S. 71
     (1988) in which the
    Supreme Court declined to hear a challenge to a state court’s award
    of punitive damages that the appellant had not raised in the state
    court. Here, although Sudan did not object to punitive damages
    before the entry of final judgment, it raised the matter in its post-trial
    motions for vacatur. Unlike in Crenshaw, the district court
    considered these untimely objections and considered their merits
    before denying vacatur. For this reason, we have a “properly
    developed record on appeal” and “a reasoned opinion on the merits”
    with which to evaluate this pure question of law. 
    Id. at 79-80
    . Also
    unlike Crenshaw, this case does not involve considerations of
    “comity to the States” as it arises under federal law, 
    id. at 79
    , and any
    concern about relations between nations cuts in favor of, rather than
    against, exercising discretionary review.
    107
    – that need no further factual development. Roosevelt, 
    958 F.2d at
    419 & n. 5. Direct review of forfeited arguments is also
    warranted for questions that bear upon sensitive matters of
    international relations. Acree, 
    370 F.3d at 58
     (finding
    exceptional circumstances from a “nearly-billion dollar default
    judgment against a foreign government”). Furthermore,
    because most cases invoking the FSIA exception for terrorism
    are brought in this district, our decision on retroactivity will
    provide useful guidance to the district court. Compare Owens
    V, 174 F. Supp. 3d at 291 (doubting whether punitive damages
    apply retroactively but declining to vacate award) with
    Flanagan v. Islamic Republic of Iran, 
    190 F. Supp. 3d 138
    , 182
    (D.D.C. 2016) (vacating punitive damages despite the
    defendant’s default) and Kumar v. Republic of Sudan, No.
    2:10-cv-171, at 39 n.17 (E.D. Va. Oct. 25, 2016) (approving
    retroactive assessment of punitive damages); see also
    Leatherman, 
    532 U.S. at 436
     (noting that “[i]ndependent
    review [of punitive damages] is . . . necessary if appellate
    courts are to maintain control of, and to clarify, the legal
    principles”). Given the size of the awards, the strength of
    Sudan’s contentions, and the likelihood of this question
    recurring, we believe reviewing the award of punitive damages
    both promotes “the interests of justice” and “advance[s]
    efficient judicial administration.” City of Newport, 453 U.S. at
    257. We therefore exercise our discretion to consider Sudan’s
    belated objections.
    B. Retroactivity of Punitive Damages Under § 1605A(c)
    In challenging the punitive damage awards, Sudan raises
    the “presumption against retroactive legislation” explicated in
    Landgraf v. USI Film Products, 
    511 U.S. 244
    , 265 (1994).
    Courts “have declined to give retroactive effect to statutes
    burdening private rights unless Congress had made clear its
    intent.” 
    Id. at 270
    . This presumption avoids “the unfairness of
    108
    imposing new burdens on persons after the fact,” absent a clear
    signal of congressional intent to do so. 
    Id.
     The Court in
    Landgraf noted the retroactive authorization of punitive
    damages, in particular, “would raise a serious constitutional
    question.” 
    Id. at 281
    .
    An analysis of retroactivity entails two steps. First, the
    court must determine “whether Congress has expressly
    prescribed the statute’s proper reach.” 
    Id. at 280
    . If the
    Congress has clearly spoken, then “there is no need to resort to
    judicial default rules,” and the court must apply the statute as
    written. 
    Id.
     When “the statute contains no such express
    command,” the court must then evaluate whether the
    legislation “operate[s] retroactively,” as it does if it “would
    impair rights a party possessed when he acted, increase a
    party’s liability for past conduct, or impose new duties with
    respect to transactions already completed.” 
    Id.
     If the statute
    operates retroactively but lacks a clear statement of
    congressional intent to give it retroactive effect, then the
    Landgraf presumption controls and the court will not apply the
    statute to pre-enactment conduct. Sudan argues both that the
    new FSIA terrorism exception does not contain a clear
    statement of retroactive effect and that it operates retroactively.
    1. Section 1605A operates retroactively
    As for the latter point, it is obvious that the imposition of
    punitive damages under the new federal cause of action in
    § 1605A(c) operates retroactively because it increases Sudan’s
    liability for past conduct. Under § 1605(a)(7), the predecessor
    to the current terrorism exception, and the pass-through
    approach recognized in Cicippio-Puleo, § 1606 expressly
    barred courts from awarding punitive damages against a
    foreign sovereign. The 2008 NDAA plainly applies the new
    cause of action in § 1605A(c) to the pre-enactment conduct of
    109
    a foreign sovereign. Further, recall that, pursuant to NDAA
    § 1083(c), a plaintiff may convert a pending, prior action under
    § 1605(a)(7) into a new action under § 1605A(c) or file a new
    suit arising from the same act or incident as an action “related”
    to an original suit timely filed under § 1605(a)(7). In both
    cases, the new actions under § 1605A(c) necessarily are based
    upon the sovereign defendant’s conduct before enactment of
    § 1605A.
    The plaintiffs dispute this, relying upon Republic of
    Austria v. Altmann, 
    541 U.S. 677
     (2004), in which the Supreme
    Court held the jurisdictional provisions of the FSIA apply to
    conduct occurring prior to its enactment notwithstanding the
    absence of a clear statement to that effect in the statute. 
    Id. at 692-96, 700
    . That jurisdiction under the FSIA applies
    retroactively, however, has no bearing upon the question
    whether the authorization of punitive damages does as well.
    Unlike the grant of jurisdiction held retroactive in
    Altmann, the authorization of punitive damages “adheres to the
    cause of action” under § 1605A(c), making it “essentially
    substantive” and thereby triggering retroactive operation. Id. at
    695 n.15; cf. Landgraf, 
    511 U.S. at 274
     (“Application of a new
    jurisdictional rule usually takes away no substantive right,”
    causing it not to operate retroactively) (internal quotation
    marks omitted). Furthermore, while the original FSIA codified
    only the preexisting “restrictive theory” of foreign sovereign
    immunity, leaving the scope of a sovereign’s potential liability
    unchanged, see Altmann, 
    541 U.S. at 694
    , the new terrorism
    exception authorizes a quantum of liability – punitive damages
    – to which foreign sovereigns were previously immune.
    Having failed to distinguish the FSIA terrorism exception
    from the Supreme Court’s core concerns in Landgraf, the
    plaintiffs advance a policy argument transplanted from
    110
    Altmann. There the Court explained the “aim of the
    presumption [against retroactivity] is to avoid unnecessary post
    hoc changes to legal rules on which parties relied in shaping
    their primary conduct.” 541 U.S. at 696. In contrast, the
    plaintiffs urge “the principal purpose of foreign sovereign
    immunity . . . reflects current political realities and
    relationships, and aims to give foreign states and their
    instrumentalities some present ‘protection from the
    inconvenience of suit as a gesture of comity.’” Id. (quoting
    Dole Food Co. v. Patrickson, 
    538 U.S. 468
    , 479 (2003)).
    Because the Congress was motivated by these “sui generis”
    concerns of comity in initially passing the FSIA, 
    id.,
     the
    plaintiffs contend the presumption in Landgraf should not
    apply to a subsequent FSIA amendment, even if it appears to
    operate retroactively.
    That argument misses the central point of authorizing
    punitive damages against a state sponsor of terrorism, viz., to
    deter terrorism. By its nature, deterrence attempts to influence
    foreign sovereigns in “shaping their primary conduct.” 
    Id.
     And
    when the law affects a defendant’s past actions, “[e]lementary
    considerations of fairness dictate that individuals should have
    an opportunity to know what the law is and to conform their
    conduct accordingly.” Landgraf, 
    511 U.S. at 265
    .
    This principle applies equally to state sponsors of
    terrorism. As the Supreme Court has said, “[e]ven when the
    conduct in question is morally reprehensible or illegal, a degree
    of unfairness is inherent whenever the law imposes additional
    burdens based on conduct that occurred in the past.” 
    Id.
     at 282
    n.35. Therefore, without a clear statement of retroactivity,
    courts have properly declined to apply statutes authorizing an
    award of punitive damages, even for outrageous conduct. See,
    e.g., Ditullio v. Boehm, 
    662 F.3d 1091
    , 1100 (9th Cir. 2011)
    (holding that punitive damages under the Trafficking Victims
    111
    Protection Act are unavailable to punish child sex trafficking
    that occurred before enactment); Gross v. Weber, 
    186 F.3d 1089
    , 1091 (8th Cir. 1999) (holding the same for the Violence
    Against Women Act as applied to pre-enactment sexual abuse).
    Hence, unlike the grant of jurisdiction in Altmann, the
    authorization of punitive damages in § 1605A(c) cannot be
    dismissed as a reflection of “current political realities and
    relationships” but rather goes to the heart of the concern in
    Landgraf about retroactively penalizing past conduct.
    2. Clear statement of retroactive effect
    Having concluded that § 1605A(c) operates retroactively,
    the next question is whether the Congress has made a clear
    statement authorizing punitive damages for past conduct. We
    will find that authorization only if the statute is “so clear that it
    could sustain only one interpretation.” See Lindh v. Murphy,
    
    521 U.S. 320
    , 328 n.4 (1997). With this in mind, we agree with
    the district court that the FSIA contains no such statement.
    Owens V, 174 F. Supp. 3d at 289.
    As a starting point, we look for a clear statement in
    § 1605A(c), which provides that a designated state sponsor of
    terrorism:
    shall be liable . . . for personal injury or death
    caused by acts described in subsection (a) (1) of
    that foreign state, or of an official, employee, or
    agent of that foreign state, for which the courts
    of the United States may maintain jurisdiction
    under this section for money damages. In any
    such action, damages may include economic
    damages, solatium, pain and suffering, and
    punitive damages. In any such action, a foreign
    112
    state shall be vicariously liable for the acts of its
    officials, employees, or agents.
    On its face, nothing in the text of § 1605A(c) speaks to
    whether punitive damages are available under the federal cause
    of action for pre-enactment conduct. Nor does precedent
    provide support for retroactivity. Although Altmann held the
    grant of jurisdiction in § 1605(a) applies retroactively (despite
    lack of a clear statement to that effect), the authorization of
    punitive damages under the current terrorism exception lies in
    the cause of action under § 1605A(c), not in the grant of
    jurisdiction under § 1605A(a).
    The plaintiffs contend that § 1083(c) of the 2008 NDAA,
    when combined with the authorization of punitive damages in
    § 1605A(c), provides a clear statement of retroactive effect. As
    we have seen, supra part IV, both a converted prior action
    under § 1083(c)(2) and a related action under § 1083(c)(3)
    necessarily arise out of conduct that occurred before the
    enactment of the 2008 NDAA, and both provisions allow a
    plaintiff to proceed under the federal cause of action in
    § 1605A(c), which authorizes punitive damages. Accordingly,
    the plaintiffs contend, both § 1083(c)(2) and (c)(3), when read
    in conjunction with § 1605A(c), clearly allow a court to award
    punitive damages under the federal cause of action for pre-
    enactment conduct.
    This argument takes one too many a logical leap. Yes, by
    allowing a plaintiff to convert an action brought under
    § 1605(a)(7), § 1083(c)(2) clearly authorizes the federal cause
    of action to apply retroactively. This, however, does not mean
    that § 1083(c) authorizes the punitive damages in § 1605A(c)
    to apply retroactively as well. Cf. Roeder v. Islamic Republic
    of Iran, 
    646 F.3d 56
    , 61-62 (D.C. Cir. 2011) (finding no clear
    statement that § 1083(c)(3) abrogated the Algiers Accords
    113
    simply by allowing plaintiffs to bring actions under § 1605A
    related to those formerly dismissed by reason of the Accords).
    Instead, § 1083(c) operates as a conduit for a plaintiff to access
    the cause of action under § 1605A(c). If punitive damages
    under § 1605A(c) were not available retroactively to any
    plaintiff (including those who did not make use of § 1083(c)),
    then nothing in § 1083(c) would change that. Inversely, if
    § 1083(c) did not exist, then one plaintiff’s inability to convert
    his pending case or to bring a related action under § 1083(c)
    would not detract from the retroactive availability of punitive
    damages for another plaintiff if such relief were clearly
    authorized by the Congress. At most, Sudan has identified
    § 1083(c) as a plausible mechanism through which the
    Congress could have authorized punitive damages for past
    conduct. But Landgraf demands more, and no clear statement
    emerges from the union of § 1083(c) and § 1605A(c).
    There being no clear textual command, the plaintiffs urge
    that the purpose of § 1083(c) supplies the necessary clear
    statement of congressional intent. An argument based solely
    upon the purpose of a statute can hardly supply a “clear
    statement” of any sort. See Bowen v. Georgetown Univ. Hosp.,
    
    488 U.S. 204
    , 208 (1988) (“congressional enactments and
    administrative rules will not be construed to have retroactive
    effect unless their language requires this result”). Because an
    expansion of punitive damages would operate retroactively by
    “increas[ing] [Sudan’s] liability for past conduct,” the
    presumption in Landgraf applies and bars an award of punitive
    damages for the embassy bombings, which occurred before the
    enactment of the 2008 NDAA. Therefore, we vacate the award
    of punitive damages to plaintiffs proceeding under the federal
    cause of action.
    114
    C. Retroactivity of Punitive Damages Under State Law
    The same principle applies to the awards of punitive
    damages to plaintiffs proceeding under state law. Sudan makes
    two arguments against the availability of punitive damages for
    them. Sudan first contends that § 1605A(c) provides the sole
    source for seeking punitive damages against a foreign
    sovereign. Sudan rests this view upon § 1606 of the FSIA,
    which precludes punitive damages against a sovereign
    defendant. As we have recognized, supra p. 95, § 1606, by its
    terms, applies only to claims brought under § 1605 and § 1607
    of the FSIA. Owens V, 174 F.3d at 290. Section 1606 therefore
    has no bearing upon state law claims brought under the
    jurisdictional grant in § 1605A.
    If this were the end of the analysis, however, a puzzling
    outcome would arise from our holding that punitive damages
    are not available retroactively to plaintiffs proceeding under the
    federal cause of action in § 1605A(c). As we have said, in
    creating a federal cause of action, the Congress sought to end
    the inconsistencies in the “patchwork” pass-through approach
    of Cicippio-Puleo. See Leibovitch, 697 F.3d at 567. Allowing
    punitive damages for pre-enactment conduct under state but not
    federal law would frustrate this intent: Plaintiffs otherwise
    eligible for the federal cause of action, for which punitive
    damages are unavailable, would instead press state law claims
    for punitive damages, which would effectively perpetuate the
    inconsistent outcomes based upon differences in state law that
    the Congress sought to end by passing § 1605A.
    As it happens, the retroactive authorization of punitive
    damages under state law fails for the same reason it does under
    the federal cause of action: The authorization of § 1605A, read
    together with § 1606, lacks a clear statement of retroactive
    effect. Without the Landgraf presumption, the enactment of
    115
    § 1605A would have lifted the restriction on punitive damages
    in § 1606 from state law claims. If the express authorization of
    punitive damages under § 1605A(c) lacks a clear statement of
    retroactive effect, then the implicit, backdoor lifting of the
    prohibition against punitive damages in § 1606 for state law
    claims fares no better. Cf. Landgraf, 
    511 U.S. at 259-60
    (finding that cross-references between several sections of the
    Civil Rights Act did not impliedly make a clear statement of
    retroactive effect). As a result, a plaintiff proceeding under
    either state or federal law cannot recover punitive damages for
    conduct occurring prior to the enactment of § 1605A.
    Accordingly we vacate all the awards of punitive damages.
    VII.      Vacatur Under Rule 60(b)
    Finally, Sudan argues the district court abused its
    discretion in denying its motions to vacate the default
    judgments, invoking three sections of the Rule 60(b): the
    judgments are void for lack of subject matter jurisdiction per
    § (b)(4); default was due to “excusable neglect” per § (b)(1);
    and relief may be justified for “any other reason” per § (b)(6).
    The first jurisdictional ground is nondiscretionary, Bell
    Helicopter, 734 F.3d at 1179, and has been rejected already in
    the sections on extrajudicial killing, jurisdictional causation,
    and the ability of family members of a victim physically injured
    by the bombings to press a claim under § 1605A.
    We review the district court’s decision to deny vacatur on
    the other two grounds for abuse of discretion. Gonzalez, 
    545 U.S. at 535
     (“Rule 60(b) proceedings are subject to only limited
    and deferential appellate review”). In doing so, we recognize
    “the district judge, who is in the best position to discern and
    assess all the facts, is vested with a large measure of discretion
    in deciding whether to grant a Rule 60(b) motion.” Twelve John
    Does v. District of Columbia, 
    841 F.2d 1133
    , 1138 (D.C. Cir.
    116
    1988). Deferential review preserves the “delicate balance
    between the sanctity of final judgments . . . and the incessant
    command of a court’s conscience that justice be done in light
    of all the facts.” Good Luck Nursing Home, Inc. v. Harris, 
    636 F.2d 572
    , 577 (D.C. Cir. 1980) (emphasis and internal
    quotation marks removed). With respect to Rule 60(b)(1), relief
    for excusable neglect “is rare” as “such motions allow district
    courts to correct only limited types of substantive errors,” Hall
    v. CIA, 
    437 F.3d 94
    , 99 (D.C. Cir. 2006), and relief for “any
    other reason” under Rule 60(b)(6) is even more rare, being
    available only in “extraordinary circumstances,” Ackermann v.
    United States, 
    340 U.S. 193
    , 199 (1950). Factual
    determinations supporting the district court’s decision are, of
    course, reviewed only for clear error. Gates v. Syrian Arab
    Republic, 
    646 F.3d 1
    , 4 (D.C. Cir. 2011).
    Sudan, as “the party seeking to invoke Rule 60(b),” bears
    “the burden of establishing that its prerequisites are satisfied.”
    
    Id. at 5
     (internal alterations and quotation marks removed). As
    we have said before, “no principle of sovereign immunity law
    upsets the parties’ respective burdens under Rule 60(b); nor do
    oft cited ephemeral principles of fairness” demand a different
    result for a foreign sovereign than for a private litigant. 
    Id.
     In
    order to secure vacatur, therefore, Sudan must show the district
    court, in denying its motion for relief, relied upon an incorrect
    understanding of the law or a clearly erroneous fact. Sudan has
    not met this burden.
    A. Excusable Neglect Under Rule 60(b)(1)
    We begin with Sudan’s claim of excusable neglect, which
    the district court addressed in detail. In evaluating a claim of
    excusable neglect, a court makes an equitable determination
    based upon “the danger of prejudice to the [non-moving party],
    the length of the delay and its potential impact on judicial
    117
    proceedings, the reason for the delay, including whether it was
    within the reasonable control of the movant, and whether the
    movant acted in good faith.” Pioneer Inv. Servs. Co. v.
    Brunswick Assocs., 
    507 U.S. 380
    , 395 (1993). Additionally, a
    party seeking vacatur must “assert a potentially meritorious
    defense.” FG Hemisphere Assocs., LLC v. Democratic
    Republic of Congo, 
    447 F.3d 835
    , 842 (D.C. Cir. 2006).
    In its motion, Sudan submitted a three-page declaration
    from Maowia Khalid, the Ambassador of Sudan to the United
    States, explaining its failure to participate in much of the
    litigation. First, the Ambassador asserted Sudan’s ongoing
    domestic problems, including natural disasters and civil war,
    rendered it unable to appear. Khalid Decl. ¶ 4. Second, the
    Ambassador said a “fundamental lack of understanding in
    Sudan about the litigation process in the United States”
    accounted its prolonged absence from the litigation. Id. ¶ 5.
    The district court soundly rejected both reasons. On Sudan’s
    domestic troubles, the district court noted that “[s]ome of that
    turmoil . . . has been of the Sudanese government's own
    making,” but, regardless of blame, Sudan could not excuse at
    least six years of nonparticipation without sending a single
    communication to the court. Owens V, 174 F. Supp. 3d at 255.
    The court further doubted the credibility of Sudan’s alleged
    ignorance of U.S. legal procedure. After all, Sudan had used
    this excuse to escape an earlier default in the same litigation,
    and the “fundamental-ignorance card cannot convincingly be
    played a second time.” Id. at 256.
    Although the district court, in denying Sudan’s Rule 60(b)
    motion, addressed all the elements of “excusable neglect”
    mentioned in Pioneer, on appeal Sudan challenges only the
    “reason for the delay” and the “length of the delay.” The district
    court’s unchallenged finding that “vacatur would pose a real
    risk of prejudice to the plaintiffs,” Owens V, 174 F. Supp. 3d at
    118
    257, makes it difficult to imagine Sudan could prevail even if
    it were to succeed on the two elements it does raise, Pioneer,
    
    507 U.S. at 397
     (affirming a holding of excusable neglect when
    the “petitioner does not challenge the findings made below
    concerning . . . the absence of any danger of prejudice” to him),
    but we consider its arguments nonetheless.
    Preliminarily, Sudan also contends the district court
    “ignored” the “policy favoring vacatur under Rule 60(b)” as it
    applies to a foreign sovereign. Sudan then claims error in the
    district court purportedly blaming Sudan for the circumstances
    that prompted its default. Finally, Sudan faults the district
    court’s comparison of the instant case to FG Hemisphere, in
    which this court vacated a default judgment against the
    Democratic Republic of Congo (DRC).
    On the first point, Sudan correctly notes that precedent in
    this Circuit supports a liberal application of Rule 60(b)(1) to
    default judgments. See Jackson v. Beech, 
    636 F.2d 831
    , 836
    (D.C. Cir. 1980). This stems from the general policy favoring
    adjudication on the merits. Id.; Foman v. Davis, 
    371 U.S. 178
    ,
    181-82 (1962). The policy has particular force with respect to
    a defaulting sovereign because “[i]ntolerant adherence to
    default judgments against foreign states could adversely affect
    this nation’s relations with other nations and undermine the
    State Department’s continuing efforts to encourage foreign
    sovereigns generally to resolve disputes within the United
    States’ legal framework.” FG Hemisphere, 
    447 F.3d at 838-39
    (quoting Practical Concepts, 
    811 F.2d at
    1551 n.19). Further,
    we have noted, “[w]hen a defendant foreign state has appeared
    and asserts legal defenses, albeit after a default judgment has
    been entered, it is important . . . , if possible, that the dispute be
    resolved on the basis of [] all relevant legal arguments.”
    Practical Concepts, 
    811 F.2d at 1552
    .
    119
    For these reasons, the U.S. Government on many
    occasions has submitted an amicus brief urging vacatur of a
    default judgment against a foreign sovereign. See, e.g., id.; FG
    Hemisphere, 
    447 F.3d at 838
    ; Gregorian v. Izvestia, 
    871 F.2d 1515
    , 1518 (9th Cir. 1989); Jackson v. People’s Republic of
    China, 
    794 F.2d 1490
    , 1495 (11th Cir. 1986). In this case,
    however, we think it significant that the Government has not
    taken a position on Sudan’s motion to vacate. Indeed, with only
    two factually unique exceptions, see Beaty, 
    556 U.S. at
    855 and
    Roeder, 
    646 F.3d at 56
    , the Government has not weighed in on
    behalf of a defendant state sponsor of terrorism. Cf. Doe v.
    Exxon Mobil Corp., 
    473 F.3d 345
    , 360 (D.C. Cir. 2007) (noting
    that “courts give deference . . . when the Executive reasonably
    explains that adjudication of a particular civil lawsuit would
    adversely affect the foreign policy interests of the United
    States”).
    Absent an expressed governmental concern with the
    liability of a foreign sovereign, the general policy favoring
    vacatur, by itself, cannot control the resolution of Sudan’s Rule
    60(b) motion. After all, the FSIA expressly authorizes default
    judgments against absent sovereigns. See 
    28 U.S.C. § 1608
    (e).
    If policy considerations alone made vacatur of judgments
    against foreign sovereigns under Rule 60(b) near-automatic,
    then the general policy favoring vacatur would render the
    specific authorization of default judgments in the FSIA a
    nullity. A district court would abuse its discretion if it were
    simply to apply the general policy, as Sudan asks us to do now,
    without considering the specific facts at hand. See FG
    Hemisphere, 
    447 F.3d at 838-42
     (noting the general policy
    opposing vacatur but considering the Pioneer factors).
    Considering those facts, we see why the district court said that
    “shouldering [Sudan’s] burden is a Herculean task.” Owens V,
    174 F. Supp. 3d at 254. Indeed, if we were to vacate the default
    judgment in this case, then we could not expect any sovereign
    120
    to participate in litigation rather than wait for a default
    judgment, move to vacate it under Rule 60(b), appeal if
    necessary, and then reenter the litigation to contest the merits,
    having long delayed its day of reckoning. Cf. H. F. Livermore
    Corp. v. Aktiengesellschaft Gebruder Loepfe, 
    432 F.2d 689
    ,
    691 (D.C. Cir. 1970) (approving of default judgments “when
    the adversary process has been halted because of an essentially
    unresponsive party” in which case “the diligent party must be
    protected lest he be faced with interminable delay and
    continued uncertainty as to his rights”).
    Sudan’s own actions place it well outside the general
    policy favoring vacatur. In the cases it cites, relief was justified
    because the defendant had no notice of the default and
    promptly responded once made aware of the judgment. See
    Bridoux v. E. Air Lines, 
    214 F.2d 207
    , 209 (D.C. Cir. 1954);
    FG Hemisphere, 
    447 F.3d at 839
    . In contrast, Sudan knew of
    the Owens action, twice obtained sophisticated legal counsel in
    2004, and fully participated in the litigation before absenting
    itself in 2005. In another case involving a foreign sovereign,
    there was no abuse of discretion in denying vacatur because the
    defendant had “received actual or constructive notice of the
    filing of the action and failed to answer” or to provide a good-
    faith reason for its unresponsiveness. See Meadows v.
    Dominican Republic, 
    817 F.2d 517
    , 521 (9th Cir. 1987).
    Moreover, unlike the foreign sovereigns in some cases vacating
    default judgments, see, e.g., Gregorian, 
    871 F.2d at 1525
    ;
    Jackson, 
    794 F.2d at 1495-96
    , Sudan cannot claim to have
    defaulted in the reasonable belief that it enjoyed sovereign
    immunity. Several decisions of the district court and this court
    served on Sudan suggested the evidence proffered by the
    Owens plaintiffs could meet or met their burden of production
    121
    to establish the jurisdiction of the court. 9 Even when served
    with the district court’s 2011 opinion on liability, which
    definitively established Sudan’s lack of immunity, Sudan let
    three years pass before filing its motion to vacate. For these
    reasons, Sudan’s lack of diligence in pursuing its Rule 60(b)
    motion weighs heavily against vacatur. Cf. Reinsurance Co. of
    Am. v. Administratia Asigurarilor de Stat, 
    902 F.2d 1275
    ,
    1276, 1278 (7th Cir. 1990) (affirming denial of Rule 60(b)
    motion made by a state-owned insurance company for failure
    to “demonstrate the diligence necessary” to vacate a default
    judgment).
    Furthermore, this is not the first time Sudan has sought to
    vacate its default or default judgment. In May 2003 the district
    court entered a default against Sudan for failure to appear. Ten
    months later, Sudan secured counsel and moved for vacatur
    under Rule 55(c), which the court granted based upon the very
    “presumption against an entry of default judgment against a
    foreign state” that Sudan claims the court ignored in 2016.
    Owens I, 
    374 F. Supp. 2d at 9
    , 10 n.5. But the presumption
    against a default judgment is just that – a presumption. The
    rationale for leniency is necessarily weaker when a defendant
    seeks to excuse its second default. See Flanagan, 190 F. Supp.
    3d at 158 (noting, as well, Sudan’s prior default in Rux v.
    Republic of Sudan, No. 2:04-cv-0428, 
    2005 WL 2086202
    , at
    *2-3, *12-13 (E.D. Va. Aug. 26, 2005)). A double-defaulting
    sovereign also loses the ability to assert certain “reasons for the
    9
    See Owens IV, 
    826 F. Supp. 2d at 150
     (“Plaintiffs have satisfied
    their burden under 
    28 U.S.C. § 1608
    (e) to show . . . Sudan . . .
    provided material support and resources . . . for acts of terrorism”);
    Owens I, 
    374 F. Supp. 2d at 17-18
     (noting the plaintiffs “will have
    no trouble in making [the] allegation[s]” necessary to “survive a
    motion to dismiss”) (quoting Price, 294 F.3d at 93); Owens II, 
    412 F. Supp. 2d at 108-09, 115
     (holding the plaintiffs’ claims, accepted
    as true, satisfied the pleading standards of the FSIA).
    122
    delay,” including ignorance of the law and a reasonable belief
    in its own immunity. It is still more difficult to show “good
    faith” by a defendant that has walked away a second time
    without so much as a fare thee well. Hence, the general policy
    favoring relief from default judgments is not enough to
    overcome Sudan’s double default in this case. 10
    Finally, it bears mentioning that the district court and now
    this court have afforded Sudan, as a foreign sovereign,
    substantial protection against the harsh consequences of a
    default judgment. Notwithstanding Sudan’s failure to
    participate, the district court assessed whether the plaintiffs’
    evidence was satisfactory, once to prevail on the merits and
    twice to establish jurisdiction. See Owens IV, 
    826 F. Supp. 2d at 139-46
     (applying 
    28 U.S.C. § 1608
    (e)); Owens V, 174 F.
    Supp. 3d at 275-80. Furthermore, the district court (and now
    this court de novo) reviewed Sudan’s jurisdictional arguments
    pursuant to its Rule 60(b)(4) motion. We have also exercised
    our discretion to consider several of Sudan’s nonjurisdictional
    objections, even though Sudan forfeited these arguments by
    defaulting. We even granted Sudan relief from punitive
    10
    In a supplemental filing, Sudan points to our recent decision in
    Gilmore, in which we held the district court did not abuse its
    discretion by vacating two defaults entered against the Palestinian
    Authority in light of the defendant’s willingness to participate in
    subsequent discovery and litigation. 843 F.3d at 995-96. In doing so,
    Sudan notes, we referenced “the federal policy favoring trial over
    default judgment.” Id. at 995 (quoting Whelan v. Abell, 
    48 F.3d 1247
    ,
    1258 (D.C. Cir. 1995)). But Gilmore dealt with vacatur of a default
    under Rule 55(c); the less-demanding “good cause” standard for
    vacating a default under that rule “frees a court from the restraints of
    Rule 60(b)” and “entrusts the determination to the discretion of the
    court.” Id. at 996 (quoting 10A CHARLES A. WRIGHT, ARTHUR R.
    MILLER & MARY K. KANE, FEDERAL PRACTICE AND PROCEDURE
    § 2694 (3d ed. 2016)).
    123
    damages despite its failure timely to object to these awards in
    the district court. Therefore, Sudan cannot complain “the
    dispute [has not been] resolved on the basis of . . . all relevant
    legal arguments.” See Practical Concepts, 
    811 F.2d at 1552
    .
    Beyond relying upon the general policy in favor of
    vacatur, Sudan challenges the reasoning behind the district
    court’s decision. In particular, Sudan faults the district court for
    holding it responsible for its domestic troubles, contending a
    court may not consider “the question of blame” in analyzing
    excusable neglect. Sudan is twice wrong. Not only have courts
    consistently recognized that a defendant’s “culpable conduct”
    may justify denying it relief under Rule 60(b)(1), see Mfrs.’
    Indus. Relations Ass’n v. E. Akron Casting Co., 
    58 F.3d 204
    ,
    206 (6th Cir. 1995) (inquiring “[w]hether culpable conduct of
    the defendant led to the default”); Gregorian, 
    871 F.2d at 1523
    ;
    Info. Sys. & Networks Corp. v. United States, 
    994 F.2d 792
    ,
    795 (Fed. Cir. 1993), but the district court expressly based its
    decision upon Sudan’s unresponsiveness, not its
    blameworthiness; “setting aside the question of blame,” it said:
    Domestic turmoil would surely have justified
    requests by Sudan for extensions of time in
    which to respond to the plaintiffs’ filings. It
    would have also probably led the Court to
    forgive late filings. And perhaps it would have
    even justified a blanket stay of these cases. But
    Sudan was not merely a haphazard,
    inconsistent, or sluggish litigant during the
    years in question – it was a complete and utter
    nonlitigant. Sudan never sought additional time
    or to pause any of these cases in light of troubles
    at home. Sudan never even advised the Court of
    those troubles at the time they were allegedly
    preventing Sudan's participation – not through
    124
    formal filings, and not through any letters or
    other mode of communication with the Court.
    The idea that the relevant Sudanese officials
    could not find the opportunity over a period of
    years to send so much as a single letter or email
    communicating Sudan's desire but inability to
    participate in these cases is, quite literally,
    incredible.
    Owens V, 174 F. Supp. 3d at 256. Therefore, we find no abuse
    of discretion in the district court’s brief reference to the
    Sudan’s possible responsibility for its domestic turmoil.
    Sudan also objects to the district court’s discussion of its
    unresponsiveness, arguing the court demonstrated “a lack of
    appreciation of the operational realities of a least developed
    nation in turmoil.” But the one conclusory paragraph in the
    three-page declaration of its Ambassador to the United States
    that Sudan cites as evidence for this proposition does not show
    it was incapable of maintaining any communication with the
    district court. Indeed, Sudan participated in the litigation during
    its civil war and while negotiating a peace treaty bringing that
    war to a close. See UNMIS Background, UNITED NATIONS
    MISSION IN THE SUDAN, http://www.un.org/en/peacekeeping/
    missions/past/unmis/background.shtml (last visited July 19,
    2017). This shows Sudan could participate in legal proceedings
    despite difficult domestic circumstances. Without record
    evidence supporting Sudan’s complete inability to participate,
    the district court did not abuse its discretion in holding Sudan
    failed to carry its burden of proving excusable neglect.
    As a final argument under Rule 60(b)(1), Sudan faults the
    district court’s comparison of this case to FG Hemisphere. In
    FG Hemisphere we vacated a default judgment against the
    Democratic Republic of Congo (DRC) rendered under the
    125
    FSIA exception for commercial activity, § 1605(a)(2). 
    447 F.3d at 843
    . Sudan’s reliance upon FG Hemisphere is
    unsurprising as there we noted the DRC “was plainly hampered
    by its devastating civil war” which justified, in part, its delayed
    response. Id. at 141. But the outcome in FG Hemisphere did
    not turn solely, or even primarily, upon the domestic turmoil in
    the DRC. Problems with notice and service, not internal strife,
    principally excused the DRC’s default. In that case, the
    defendant sovereign was first notified that its diplomatic
    properties were in jeopardy when it was served with a motion
    to execute a default judgment a mere six days before a response
    was due. Id. at 839-40. The plaintiffs’ failure to translate the
    motion from English into French, the official language of the
    DRC, “virtually guaranteed the DRC’s inability to file a timely
    response.” Id. That the DRC was then engaged in a
    “devastating civil war” merely diminished its “capacity . . . for
    [the] swift and efficient handling of . . . English-language
    materials”; it did not ultimately prevent the DRC from
    responding to the motion, which it did shortly after receipt. Id.
    at 840-41.
    Unlike the DRC in FG Hemisphere, Sudan had notice of
    the litigation from the time it was first sued. The district court’s
    2011 opinion on liability was translated into Arabic, Sudan’s
    national language, and delivered through diplomatic channels.
    Sudan cannot, and does not, complain about defects in notice
    or service of process. See Owens V, 174 F. Supp. 3d at 255
    (noting that “Sudan’s council conceded, ‘there’s no dispute
    about service being proper’”).
    Nor can Sudan claim to be surprised by the suits, as was
    the defendant in FG Hemisphere. Sudan actively participated
    in the litigation from February 2004 until January 2005. Even
    after disengaging from the case, Sudan contacted its counsel
    for a status update in September 2008. If Sudan indeed needed
    126
    to divert “all [its] meager legal and diplomatic personnel” to
    the “cession of south Sudan,” as its Ambassador now suggests,
    then it could have communicated this affirmative decision to
    the court, along with a request to stay the proceedings. In light
    of this history, it was not unreasonable for the district court to
    demand something more than a conclusory assertion without
    virtually any record evidence of Sudan’s inability to participate
    in the litigation.
    Also, as the district court noted, the length of delay in FG
    Hemisphere pales in comparison to Sudan’s absence in this
    case. The DRC initiated efforts to secure counsel within one
    day of receiving notice of the motion to execute. 
    447 F.3d at 838
    . Within two months, its counsel filed motions to vacate the
    default judgment and to stay its execution. 
    Id.
     In contrast,
    Sudan filed its motions to vacate the judgments 17 months after
    service of the complaint in Opati, the last of the consolidated
    cases, 40 months after the district court’s 2011 opinion on
    liability, and 53 months after the evidentiary hearing that Sudan
    did not attend. Indeed, Sudan ceased regular communication
    with counsel in the Owens action nearly eight years before
    filing its present motions. Cf. Smith v. District of Columbia,
    
    430 F.3d 450
    , 456 n.5 (D.C. Cir. 2005) (noting that delay of
    “well over a year” militated against excusable neglect). By
    defaulting, then appearing, then defaulting again, Sudan
    delayed this case for years beyond its likely end had it simply
    failed to appear at all. These affirmative actions extended the
    delay and make Sudan’s second default even less excusable
    than its first. We therefore find no error in the district court’s
    unfavorable comparison of Sudan’s default to that of the DRC
    in FG Hemisphere. In sum, none of Sudan’s arguments shows
    the district court abused its discretion in failing to vacate the
    default judgments for “excusable neglect.”
    127
    B. Extraordinary Circumstances Under Rule 60(b)(6)
    Sudan also challenges the district court’s denial of its
    motion under Rule 60(b)(6), claiming its failure to appear was
    justified by “extraordinary circumstances.” 11 Because Rule
    60(b)(1) contains a one-year filing deadline for claims of
    “excusable neglect,” which Sudan missed with respect to the
    11
    In addition, Sudan moves to vacate the judgments in favor of
    foreign family members and the awards of punitive damages under
    Rule 60(b)(6), claiming the district court’s errors of law on these
    questions also provide “extraordinary circumstances” supporting
    vacatur. We have addressed these nonjurisdictional matters
    separately in the preceding sections. Although a “dispute over the
    proper interpretation of a statute,” by itself, does not likely justify
    relief under Rule 60(b)(6), Carter v. Watkins, 
    995 F.2d 305
     (D.C.
    Cir. 1993) (per curiam) (table); cf. Ctr. for Nuclear Responsibility,
    Inc. v. U.S. Nuclear Regulatory Comm’n, 
    781 F.2d 935
    , 939-40
    (D.C. Cir. 1986) (discussing a Circuit split on the matter and
    expressing doubt on whether Rule 60(b) should be used to correct
    legal errors), we have reviewed and rejected each of Sudan’s
    contentions on direct appeal from the default judgments due to the
    size of the awards in question, underlying constitutional concerns
    about retroactive liability for punitive damages, and the likelihood of
    the purely legal issues here recurring in our district court. Hence,
    there is no need to evaluate whether these claims present
    “extraordinary circumstances” under Rule 60(b)(6). In contrast to
    these purely legal arguments, which require no further factual
    development, see Roosevelt, 
    958 F.2d at
    419 & n.5, we see far less
    reason to give Sudan an opportunity to relitigate the factual record
    by vacating the default judgments, especially considering its failure
    to participate in the district court and our independent review of the
    evidence showing material support and jurisdictional causation. See
    Practical Concepts, 
    811 F.2d at 1552
     (“When a defendant foreign
    state has appeared and asserts legal defenses, albeit after a default
    judgment has been entered, it is important . . . that the dispute be
    resolved on the basis of . . . all relevant legal arguments”) (emphases
    added).
    128
    Mwila and Khaliq judgments, Sudan’s Rule 60(b)(6) motions
    are the only way it may obtain vacatur of those default
    judgments.
    Perhaps recognizing this, Sudan rephrased its earlier
    arguments asserting “excusable neglect” as requests for relief
    from those default judgments under Rule 60(b)(6). As with the
    other cases, the declaration of Ambassador Khalid figures
    prominently in Sudan’s Mwila and Khaliq motions. This gets
    Sudan nowhere. In order to receive relief under Rule 60(b)(6),
    a party must show “extraordinary circumstances” justifying
    vacatur. Gonzalez, 545 U.S. at 534. As the Supreme Court has
    explained, the grounds for vacatur under Rule 60(b)(1)
    and(b)(6) are “mutually exclusive.” Pioneer, 
    507 U.S. at 393
    .
    Therefore, “a party who failed to take timely action due to
    ‘excusable neglect’ may not seek relief more than a year after
    the judgment by resorting to subsection (6).” 
    Id.
    The district court acknowledged this distinction and
    denied Sudan’s motion under Rule 60(b)(6) as merely a
    “rehash of Sudan's Rule 60(b)(1) argument for excusable
    neglect.” Owens V, 174 F. Supp. 3d at 258. Instead of grappling
    with the district court’s actual decision, Sudan takes issue with
    the court’s reference to Ungar v. Palestine Liberation
    Organization, 
    599 F.3d 79
     (1st Cir. 2010), in which the First
    Circuit held that a sovereign’s willful default did not per se
    preclude vacatur. 
    Id. at 86-87
    . The district court was
    understandably puzzled by Sudan’s fleeting reference to Ungar
    in light of its assertions that its default was involuntary. If
    Sudan’s default was intentional, as in Ungar, the court noted,
    then relief under Rule 60(b)(1) would be unavailable. Owens
    V, 174 F. Supp. 3d at 258. But these musings were not the basis
    of the district court’s decision and therefore cannot be an abuse
    of discretion.
    129
    Undeterred, Sudan now argues Ungar demands vacatur
    when there would be “political ramifications[] and [a] potential
    effect on international relations” from a default judgment, as
    Sudan claims there would be in this case. Ungar, 
    599 F.3d at 86-87
    . In its view, these political considerations supply the
    “extraordinary circumstances” needed to vacate a default
    judgment under Rule 60(b)(6). Sudan failed to raise this
    argument before the district court, and it is therefore forfeit on
    appeal. Accordingly, we affirm the district court’s denial of
    vacatur under Rule 60(b).
    *****
    To conclude, we (1) affirm the district court’s findings of
    jurisdiction with respect to all plaintiffs and all claims;
    (2) affirm the district court’s denial of vacatur; (3) vacate all
    awards of punitive damages; and (4) certify a question of state
    law – whether a plaintiff must be present at the scene of a
    terrorist bombing in order to recover for IIED – to the District
    of Columbia Court of Appeals.
    So ordered.
    

Document Info

Docket Number: 14-5105; Consolidated with 14-5106; 14-5107; 14-7124; 14-7125; 14-7127; 14-7128; 14-7207; 16-7044; 16-7045; 16-7046; 16-7048; 16-7049; 16-7050; 16-7052

Citation Numbers: 864 F.3d 751, 2017 WL 3203263, 2017 U.S. App. LEXIS 13695

Judges: Henderson, Rogers, Ginsburg

Filed Date: 7/28/2017

Precedential Status: Precedential

Modified Date: 11/5/2024

Authorities (120)

Wagner v. Islamic Republic of Iran , 172 F. Supp. 2d 128 ( 2001 )

Roeder v. Islamic Republic of Iran , 195 F. Supp. 2d 140 ( 2002 )

Day v. McDonough , 126 S. Ct. 1675 ( 2006 )

Sebelius v. Cloer , 133 S. Ct. 1886 ( 2013 )

Kilburn v. Republic of Iran , 277 F. Supp. 2d 24 ( 2003 )

Blais v. Islamic Republic of Iran , 459 F. Supp. 2d 40 ( 2006 )

Scarborough v. Principi , 124 S. Ct. 1856 ( 2004 )

Republic of Austria v. Altmann , 124 S. Ct. 2240 ( 2004 )

Department of Homeland Security v. MacLean , 135 S. Ct. 913 ( 2015 )

Musacchio v. United States , 136 S. Ct. 709 ( 2016 )

Bolivarian Republic of Venezuela v. Helmerich & Payne Int'l ... , 137 S. Ct. 1312 ( 2017 )

Owens v. Republic of Sudan , 826 F. Supp. 2d 128 ( 2011 )

Owens v. Republic of Sudan , 412 F. Supp. 2d 99 ( 2006 )

Sutherland v. Islamic Republic of Iran , 151 F. Supp. 2d 27 ( 2001 )

United States v. Fawaz Mohammed Damrah, A/K/A Fawaz Damra , 124 F. App'x 976 ( 2005 )

First National City Bank v. Banco Para El Comercio Exterior ... , 103 S. Ct. 2591 ( 1983 )

Pacific Mutual Life Insurance v. Haslip , 111 S. Ct. 1032 ( 1991 )

Gonzalez v. Thaler , 132 S. Ct. 641 ( 2012 )

Verlinden B. v. v. Central Bank of Nigeria , 103 S. Ct. 1962 ( 1983 )

Russello v. United States , 104 S. Ct. 296 ( 1983 )

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