United States v. Nunez ( 1994 )


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    UNITED STATES COURT OF APPEALS
    FOR THE FIRST CIRCUIT

    ____________________

    No. 92-2356

    UNITED STATES OF AMERICA,

    Appellee,

    v.

    EFRAIN NU EZ,

    Defendant, Appellant.

    ____________________


    APPEAL FROM THE UNITED STATES DISTRICT COURT

    FOR THE DISTRICT OF PUERTO RICO

    [Hon. Hector M. Laffitte, U.S. District Judge] ___________________

    ____________________

    Before

    Selya, Cyr and Boudin,

    Circuit Judges. ______________

    ____________________




    Thomas R. Lincoln, with whom Law Offices of Thomas R. Lincoln was _________________ ________________________________
    on brief for appellant.
    Esther Castro-Schmidt, Assistant United States Attorney, with _____________________
    whom Charles E. Fitzwilliam, United States Attorney, and Jos A. _______________________ _______
    Quiles Espinosa, Senior Litigation Counsel, were on brief for ________________
    appellee.

    ____________________
    March 24, 1994
    ____________________

















    CYR, Circuit Judge. After a two-day jury trial, Efrain CYR, Circuit Judge. _____________

    Nu ez, a Dominican national, was convicted of possessing approxi-

    mately two kilograms of cocaine, with intent to distribute, in

    violation of 21 U.S.C. 841(a)(1). On appeal, Nu ez challenges

    the district court's refusal to suppress the contraband obtained

    during his detention by the United States Customs Service

    (Customs) at Luis Marin International Airport in Carolina, Puerto

    Rico, on Sunday, May 24, 1992.


    I I

    BACKGROUND BACKGROUND __________

    A. Airport Detention A. Airport Detention _________________

    The facts are unremarkable up until the point in time

    approximately 3:55 p.m. when Nu ez was first observed by

    two Customs agents, Olga Silva and Victor Ramos, who were "pro-

    filing passengers" near the American Airlines ticket counter.

    After Nu ez attracted their attention because he appeared to be

    walking stiffly, the agents followed him toward the American

    Airlines concourse, and observed as he cleared the security

    checkpoint without incident.1 As Nu ez placed his carry-on bag

    on the floor before presenting his passport at the Immigration

    and Naturalization Service (INS) checkpoint, Customs Agents Ramos

    and Silva noticed several bulges around his midsection and

    ____________________

    1Nu ez walked through the metal detector and passed his
    carry-on bag through the x-ray machine.

    2












    observed that he had difficulty bending. At this point, Silva

    left to summon Senior Customs Investigator Isidro Rivera Sanchez

    (Rivera).

    At approximately 4:10 p.m., Rivera approached Nu ez at

    the INS checkpoint, identified himself as a Customs agent, and

    posed a series of perfunctory questions. At one point, when

    Nu ez bent down to show Rivera his carry-on bag, Rivera observed

    the "bulges" seen by Silva and Ramos minutes before, and decided

    to question him further. Rivera escorted Nu ez to a room off the

    main concourse. Seeking to ensure that the "bulges" were not

    explosives that might have gone undetected at the security

    checkpoint, Rivera conducted a "pat-down frisk" which revealed

    that four packages had been "adapted" to fit around Nu ez's

    midsection. Finding no wires, Rivera informed Nu ez that he

    would be detained by Customs, then conducted him to a secure 8' x

    8' holding room in the customs enclosure.

    As the case wended its way through the Customs chain of

    command, two more Customs agents became involved: Senior Super-

    visory Agent Carlos Ruiz Hernandez (Ruiz) and his supervisor,

    Senior Agent Ben Garcia (Garcia). When Garcia arrived on the

    scene, he directed Ruiz to arrange for a drug-detection dog to be

    brought to the customs enclosure. Later, Garcia and Ruiz went to

    the holding room, where Garcia informed Nu ez that he was sus-

    pected of smuggling contraband and that the Drug Enforcement

    Administration (DEA) was being requested to secure a warrant to

    search his person. At approximately 5:30 to 5:45 p.m, Garcia


    3












    administered Miranda warnings to Nu ez. At approximately 5:45 to _______

    6:00 p.m., Ruiz attempted to arrange for a drug-detection dog.2

    The situation inside the holding room changed drama-

    tically as Ruiz was attending Nu ez while awaiting the arrival of

    the drug-detection dog. Suddenly, Nu ez spontaneously informed

    Ruiz that he had worked as an auto mechanic in New York but that

    work was scarce and "times are tough you have to make a buck

    any way you can." As Nu ez spoke, he slowly began unbuttoning

    his shirt. Sensing that Nu ez was preparing to shed the "bulg-

    es," Ruiz decided to "give him the opportunity," and turned away

    while continuing to observe surreptitiously. Shortly thereafter,

    Ruiz heard a rustling sound and glimpsed a series of movements.

    When Ruiz turned toward Nu ez, four packages lay near him on the

    floor; it was approximately 6:30 p.m.

    Ruiz immediately performed a field test, which indicat-

    ed that the packages contained cocaine. Nu ez was arrested. At

    Ruiz's instruction, Nu ez removed his unbuttoned shirt, revealing

    two girdles and the body imprints left by the packages he had

    been carrying around his midsection. When the passive drug-

    detection dog finally arrived at approximately 7:00 p.m., it

    ____________________

    2The record is silent as to whether any previous attempt had
    been made to obtain a drug-detection dog. The record does
    disclose, however, that the only dog available at the airport
    that Sunday afternoon, "Oby", was used for luggage screening and
    was considered too dangerous for use on a human subject, as it
    was trained to claw at the spot where it detected narcotics.
    "Zulu," the nearest "passive" drug-detection dog, was kenneled
    forty-five minutes from the airport. Zulu and her handler
    arrived at the airport at approximately 7:00 p.m., about one-half
    hour after Nu ez was formally arrested.

    4












    "alerted" in the area of Nu ez's midsection where the bulges had

    been concealed.


    B. District Court Proceedings B. District Court Proceedings __________________________

    At a pretrial conference on June 15, 1992, defense

    counsel represented that he would move to suppress the contraband

    recovered from the floor of the detention room. The district

    court accordingly entered a pretrial order pursuant to Fed. R.

    Crim. P. 12(c), setting June 22 as the deadline for pretrial

    motions and July 29 as the trial date. No motion to suppress was

    filed within the prescribed period. On July 23, however, six

    days before trial, the government informed defense counsel that

    it would introduce newly discovered evidence relating to the pre-

    arrest admission by Nu ez, which Customs Agent Ruiz only recently

    had brought to the prosecutor's attention. See supra at p.4. ___ _____

    The next day, five days before trial, defense counsel moved to

    suppress both the Nu ez admission and the contraband. The motion ____

    simply contended that the contraband was the inadmissible product

    of a pretextual investigatory stop, but asserted no challenge

    based on the duration of the detention.

    On the morning of July 29, 1992, after jury empanel- _____ ____ ________

    ment, the district court heard argument on the government's ____

    objection based on the untimeliness of the motion to suppress the

    contraband. The government argued that the relevant facts had

    been known to the defense from the beginning and that any sup-

    pression challenge to the contraband had been waived under Fed.



    5












    R. Crim. P. 12(f).3 Asked to explain the untimeliness of the

    motion, defense counsel represented to the court that Nu ez,

    against counsel's advice and perhaps without comprehending the

    full implications, had instructed counsel not to move to suppress

    the contraband but later changed his mind.

    Without ruling on the government's waiver claim under

    Federal Rule of Criminal Procedure 12(f), relating to the untime-

    liness of the motion to suppress the contraband, the district

    court proceeded to consider the contraband-suppression claim

    based on the allegedly pretextual pat-down frisk.4 Near the end _____ __ ___ _________ __________ ________ _____

    of the suppression hearing itself, however, defense counsel

    insinuated the new contention that the contraband should be

    suppressed either on the basis of the pretextual pat-down frisk

    or an unconstitutionally prolonged detention.5 The latter
    ____________________

    3Given the timing of its disclosure, however, the government
    conceded the timeliness of the motion to suppress the Nu ez
    admission to Ruiz. Nu ez has not appealed from the district
    court ruling denying the motion to suppress the admission.

    4The district court thus tacitly allowed argument and
    evidence on the contraband-suppression issue, which it had been
    led to understand turned on the allegedly pretextual pat-down __________ ________
    frisk, the only claim raised in the motion to suppress the _____ ___ ____ _____ ______ __ ___ ______ __ ________ ___
    contraband. __________

    5During cross-examination of the Customs agents, defense
    counsel elicited testimony relating to the frisk and the ensuing
    detention. Then, in a staccato presentation near the end of the
    suppression hearing, defense counsel for the first time
    briefly injected the claim that the excessive duration of the
    detention had tainted the voluntariness of Nu ez' surrender of
    the contraband. With the empaneled jury waiting, the district
    court simply noted the customs agents' testimony that Nu ez had
    been detained pending the issuance of a warrant authorizing the
    DEA to search his person. Defense counsel then countered that
    the government had presented no evidence that the agents had even
    attempted to obtain a warrant. Thereupon, the court's attention

    6












    theory had neither been raised in the motion to suppress nor at

    the post-empanelment argument upon which the district court based

    its tacit decision to permit hearing on the contraband-suppres-

    sion claim based on the theory that the pat-down frisk was

    unconstitutional. See supra notes 4 & 5. As a direct conse- ___ _____

    quence of the belated insinuation of the prolonged-detention

    claim, the district court's attention was never fairly focused on

    the principal contraband-suppression theory presently advanced on

    appeal.6


    II II

    DISCUSSION DISCUSSION __________

    A. Duration of Detention A. Duration of Detention _____________________

    We first consider whether the suppression theory

    clearly asserted for the first time on appeal that the surren-

    der of the contraband was the product of an unconstitutionally

    prolonged detention was waived. Criminal Rule 12(f) provides:

    "Failure by a party to raise defenses or objections or to make

    requests which must be made prior to trial, at the time set by ____ __ ____ _____ __ _____

    the court pursuant to subdivision (c), or prior to any extension
    ____________________

    was once again abruptly drawn back to the legality of the pat-
    down frisk. Ultimately, the court denied the motion to suppress,
    in its entirety, without stating any "essential findings" relat-
    ing to the duration of the detention as contemplated by Fed. R.
    Crim. P. 12(e).

    6The principal by-products of these scattershot defense
    tactics are the absence of factual findings on matters essential
    to reliable appellate review of the district court's ruling that
    the surrender of the contraband was voluntary, and the absence of
    any ruling or finding whatever as to the reasonableness of the
    detention itself. See Fed. R. Crim. P. 12(e). ___

    7












    thereof made by the court, shall constitute waiver thereof, but

    the court for cause shown may grant relief from the waiver."

    Fed. R. Crim. P. 12(f) (emphasis added).7 See United States v. ___ _____________

    Gomez, 770 F.2d 251, 253 (1st Cir. 1985) (Rule 12 implements an _____

    "important social policy"; waiver results absent compliance); see ___

    also Brooks v. United States, 416 F.2d 1044, 1047-48 (5th Cir. ____ ______ _____________

    1969) (same), cert. denied, 400 U.S. 840 (1970). The record ____ ______

    reflects that the district court neither found "cause" nor

    granted relief from waiver under Rule 12(f).8
    ____________________

    7Rule 12(b)(3) mandates that all motions to suppress be
    presented prior to trial; Rule 12(c) empowers the court, by rule
    or order, to prescribe time limits for filing Rule 12 motions.
    Fed. R. Crim. P. 12(b)(3), (c).

    8At the hearing reluctantly convened by the trial judge
    following jury empanelment, defense counsel obliquely raised
    arguments altogether distinct from those presented in the motion
    to suppress the contraband. See supra notes 4 & 5. We have made ___ _____
    it crystal clear that "[l]egal arguments cannot be interchanged
    at will." United States v. Lilly, ___ F.3d ___, ___ (1st Cir. _____________ _____
    1994) [No. 93-1577, slip op. at 5 (Jan. 4, 1994)]; United States _____________
    v. Dietz, 950 F.2d 50, 55 (1st Cir. 1991) ("We repeatedly have _____
    ruled . . . that arguments not seasonably addressed to the trial __________ _________
    court may not be raised for the first time in an appellate
    venue.") (emphasis added). See also United States v. Bailey, 675 ___ ____ _____________ ______
    F.2d 1292, 1294 (D.C. Cir.) (similar), cert. denied sub nom. _____ ______ ___ ____
    Walker v. United States, 459 U.S. 853 (1982); accord, United ______ _____________ ______ ______
    States v. Dewitt, 946 F.2d 1497, 1502 (10th Cir. 1991) ("[W]aiver ______ ______
    provision applies not only to the failure to make a pretrial
    motion, but also to the failure to include a particular argument __________ ________
    in the motion.") (emphasis added), cert. denied sub nom. Rison v. _____ ______ ___ ____ _____
    United States, 112 S. Ct. 1233 (1992). The Trojan Horse tactic _____________
    employed by the defense below virtually ensured that its
    suppression claim based on the duration of the detention would _____ __ ___ ________ __ ___ _________
    escape serious focus from the government and the court at the
    post-empanelment suppression hearing, see supra notes 4, 5 & 6, ___ _____
    thereby circumventing the time bar fixed in the pretrial order,
    see supra note 7, the "cause" showing required for relief from ___ _____
    waiver under Fed. R. Crim. P. 12(f), and the government's right
    to compel resolution of the contraband-suppression claim prior to
    trial in order to preserve its right to pretrial review under 18
    U.S.C. 3731. See note 9 infra; see also United States v. ___ _____ ___ ____ _____________

    8












    Even though appellate courts on occasion have implied

    relief from waiver under Rule 12(f) where the trial court pro-

    ceeds to address the suppression issue on the merits, see, e.g., ___ ____

    United States v. Vasquez, 858 F.2d 1387, 1389 (9th Cir. 1988), ______________ _______

    cert. denied, 488 U.S. 1034 (1989); contra United States v. ____ ______ ______ ______________

    Oldfield, 859 F.2d 392, 396-98 (6th Cir. 1988), we have not had ________

    occasion, nor are we disposed, sua sponte, to conjure relief from ___ ______

    waiver under Rule 12(f) in circumstances where no cause for

    relief appears and the district court record does not enable

    reliable appellate review on the merits.

    First, it would make Rules 12(b)(3) and (f) meaningless

    were an unexplained change of mind on the part of the defendant

    deemed "cause" for relief from waiver, following jury empanel- _________ ____ ________

    ment, under a rule fundamental to orderly pretrial procedure. In ____

    this vein, it is instructive to contrast the circumstances

    surrounding the late requests to suppress the contraband and the

    Nu ez admission. The government's failure to disclose the Nu ez

    admission until shortly before trial provided a paradigmatic

    example of "cause" for relief from waiver under Rule 12(f). See, ___

    e.g., United States v. Lamela, 942 F.2d 100, 104 (1st Cir. 1991) ____ _____________ ______

    (holding that a Rule 12(b)(2) motion first asserted at trial was

    not time-barred where the relevant information did not become

    available until trial). On the other hand, no extrinsic justifi-

    cation whatever is suggested for the belated request to suppress

    the contraband due to the duration of the detention even though
    ____________________

    Barletta, 644 F.2d 50, 54 (1st Cir. 1981). ________

    9












    all the relevant facts were known to the defense from the outset. ____ ___ ______

    Instead, the untimeliness is attributed exclusively to Nu ez's

    original decision not to challenge the contraband. In these

    circumstances, we believe something more than an unexplained

    change of mind must be shown to warrant relief from a Rule 12(f)

    waiver brought on by the defendant's tactical decision. See ___

    United States v. Gonzales, 749 F.2d 1329, 1336 (9th Cir. 1984) ______________ ________

    (upholding denial of relief from waiver under Rule 12(f) after

    defendant changed mind about whether to move to suppress).

    Second, Rule 12 itself provides that the court shall

    not defer a pretrial motion for determination at trial, even for

    "good cause" shown, "if a party's right to appeal is adversely

    affected." Fed. R. Crim. P. 12(e). "Once a jury has been sworn

    and jeopardy attaches, the government loses its right to appeal

    an adverse ruling on suppression." United States v. Taylor, 792 _____________ ______

    F.2d 1019, 1025 (11th Cir. 1986) (scope of discretion to grant

    relief under Rule 12(f) narrows once jeopardy has attached),

    citing 18 U.S.C. 3731,9 cert. denied sub nom. King v. United ______ _____ ______ ___ ____ ____ ______

    States, 481 U.S. 1030 (1987). See United States v. Barletta, 644 ______ ___ _____________ ________

    F.2d 50, 54 (1st Cir. 1981) (Coffin, C.J.) ("[D]efendants'

    motions to suppress, based on the exclusionary rule, are at the
    ____________________

    9The relevant portion of 18 U.S.C. 3731 reads as follows:

    An appeal by the United States shall lie to a
    court of appeals from a decision or order of a district
    courts [sic] suppressing or excluding evidence or
    requiring the return of seized property in a criminal
    proceeding, not made after the defendant has been put
    in jeopardy and before the verdict or finding on an
    indictment or information . . . . (footnote omitted).

    10












    heart of the legislative purpose in providing government appeal

    rights."). On the other hand, the defense tactic employed below

    would have insulated from pretrial review, pursuant to 18 U.S.C.

    3731, any exclusionary ruling based on the duration of the

    detention. As our court clearly explained in Barletta, 644 F.2d ________

    at 54-55:

    Were a defendant able to delay such a motion
    until trial, he could prevent the government
    from appealing, thus frustrating the central
    purpose of 3731. It is for this reason
    that motions to suppress motions based on
    the exclusionary rule alone must be made
    by a defendant prior to trial or not at all,
    and for this reason as well that a district
    court ordinarily may not defer a ruling on a
    defendant's motion to suppress. We agree
    with the district court that such rulings and
    the government's ability to appeal them are
    at the core of 12(e).

    Under these circumstances, therefore, relief from waiver of the

    Nu ez suppression claim based on the duration of the detention

    will not be implied. See id. at 54; see also, e.g., United ___ ___ ___ ____ ____ ______

    States v. Gomez-Benabe, 985 F.2d 607, 611-12 (1st Cir. 1993) ______ ____________

    (finding Rule 12(f) waiver and concluding that: "[i]t is unneces-

    sary to address the substantive aspects of appellant's arguments

    [that should have been raised in a pretrial motion to suppress]

    since appellant has totallyfailed to put the matterin issue.").10
    ____________________

    10Few courts have squarely considered whether a Rule 12(f)
    waiver obviates "plain error" review under Rule 52(b). See, ___
    e.g., United States v. Howard, 998 F.2d 42, 52 (2d Cir. 1993); ____ ______________ ______
    but see Gomez-Benabe, 985 F.2d at 611-12. A number of courts ___ ___ ____________
    have proceeded with "plain error" review, however, without dis-
    cussing the impact of the Rule 12(f) waiver. See, e.g., United ___ ____ ______
    States v. Gio, 7 F.3d 1279, 1285 (7th Cir. 1993) (severance claim ______ ___
    waived under Rule 12(f) reviewed for plain error); United States _____________
    v. Milian-Rodriguez, 828 F.2d 679, 684 (11th Cir. 1987) (same, ________________

    11












    B. Pat-down Frisk B. Pat-down Frisk ______________

    Lastly, Nu ez argues that the pat-down frisk conducted

    by Customs was pretextual a search for contraband rather than

    a security frisk for weapons and that the contraband subse-

    quently recovered by Customs therefore should have been sup-

    pressed under Wong Sun v. United States, 371 U.S. 471 (1963). _________ _____________

    Nu ez insists that the Customs agents could not have apprehended

    ____________________

    motion to suppress), cert. denied, 486 U.S. 1054 (1988). In a _____ ______
    different context, we have suggested that "plain error" review
    may be required, notwithstanding waiver. See, e.g., United ___ ____ ______
    States v. Cyr, 712 F.2d 729, 735 n.4 (1st Cir. 1983) (noting that ______ ___
    reversal on severance claim waived under Rule 12(f) would be _________
    "mandated only if there is plain error.") (dicta). In any event,
    our precedent does not require "plain error" review in circum-
    stances where reliable review has been rendered impossible by
    inadequate development at the district court level and the
    exclusionary-rule suppression issue pressed on appeal was not
    broached below until after jeopardy attached. See Barletta, 644 ___ ________
    F.2d at 54-55. See also United States v. Davenport, 986 F.2d ___ ____ _____________ _________
    1047, 1048 (7th Cir. 1993).
    The record in this case would not enable a reliable appel-
    late determination as to the reasonableness of the Custom's
    agents' actions in light of all the relevant circumstances
    prevailing at the time. See, e.g., United States v. Quinn, 815 ___ ____ _____________ _____
    F.2d 153, 157-58 (1st Cir. 1987). Although the record certainly
    is susceptible to the interpretation that approximately two hours
    elapsed before Nu ez was formally arrested, it is neither "obvi-
    ous" nor "clear," see United States v. Olano, ___ U.S. ___, ___, ___ _____________ _____
    113 S. Ct. 1770, 1777 (1993), for instance, that the actual
    circumstances confronting the officers did not render the deten-
    tion reasonable; that the detention did not constitute a reason-
    able border detention; or, indeed, that the officers did not have
    probable cause at some point prior to the formal arrest. Thus,
    Nu ez has not met the burden of proving plain error, even assum-
    ing such review were appropriate in the wake of the deliberate
    Rule 12(f) waiver. See United States v. Olivier-Diaz, ___ F.3d ___ _____________ ____________
    ___, ___ (1st Cir. 1993) [No. 93-1306, slip op. at 11 (December
    22, 1993)] ("[E]rror cannot be 'clear' or 'obvious' unless the
    desired factual finding is the only one supported by the record
    below."); United States v. Petrozziello, 548 F.2d 20, 22 (1st _____________ ____________
    Cir. 1977) ("Appellant's failure to raise the issue below means
    that a critical factual dispute remains unsolved. We cannot find
    plain error on this silent record.").

    12












    a genuine security risk warranting a pat-down frisk for weapons

    at the INS checkpoint because he had just passed through the

    security checkpoint without incident. See supra note 1. Fur- ___ _____

    thermore, he argues, the Customs agents would have searched his

    carry-on bag as well were they genuinely concerned for their

    personal security as the government asserts.11

    The trial court is required to assess "the totality of

    the circumstances" confronting the officers, rather than dissect-

    ing the evidence and weighing the individual components. United ______

    States v. Trullo, 809 F.2d 108, 111 (1st Cir.), cert. denied, 482 ______ ______ _____ ______

    U.S. 916 (1987). We review its factual findings under the "clear

    error" standard, United States v. Kiendra, 663 F.2d 349, 351 (1st _____________ _______

    Cir. 1981); see also United States v. Walker, 924 F.2d 1, 3 (1st ___ ____ _____________ ______

    Cir. 1991) (pat-down frisk), and will uphold the suppression

    ruling if supported by "any reasonable view of the evidence,"

    United States v. Young, 877 F.2d 1099, 1100 (1st Cir. 1989) ______________ _____

    (citing cases).

    The district court based its findings principally on

    the agents' testimony concerning the reasons for the pat-down

    frisk. Trial court credibility determinations are prime candi-

    dates for appellate deference. See United States v. Brum, 948 ___ _____________ ____

    F.2d 817, 819 (1st Cir. 1991); cf. Anderson v. Bessemer City, 470 ___ ________ _____________
    ____________________

    11Agent Rivera testified that there was no need to search ______
    the carry-on bag at the security checkpoint, because the officers
    would have Nu ez within their direct physical control and, unlike
    a weapon concealed on his person, he would not be able to remove
    a gun from his carry-on bag before the officers could subdue him.
    We believe Rivera's testimony was sufficient to dispel the
    misgivings raised by Nu ez.

    13












    U.S. 564, 575 (1985). The suppression hearing transcript dis-

    closes abundant support for the district court finding that the

    pat-down frisk was based on a reasonable concern, on the part of

    the agents, for their own security and for the safety of airline

    passengers.12 As the record evidence supports the district

    court's reasoned conclusion, there was no error.

    Affirmed. Affirmed. ________














    ____________________

    12Nu ez's nervous behavior, the stiff manner in which he
    walked, the difficulty in bending, and the bulges underneath his
    clothing were sufficient to raise a reasonable suspicion in the
    minds of experienced law enforcement officers that Nu ez was
    carrying contraband. See United States v. Sokolow, 490 U.S. 1, 7 ___ _____________ _______
    (1989) (totality of circumstances must be considered in deter-
    mining whether there was "reasonable suspicion" for Terry stop, _____
    which must be based on "articulable facts that criminal activity
    'may be afoot,' even if the officer lacks probable cause.") In
    addition, the district court specifically credited testimony that
    certain explosive devices could have gone undetected when Nu ez
    passed through the airport security checkpoint. Considering that
    these events took place in the environs of an international
    airport where drug trafficking has been a common occurrence in
    recent years, see, e.g., United States v. Villanueva, ___ F.3d ___ ____ ______________ __________
    ___, ___ (1st Cir. 1994) [No. 93-1502, slip op. at 5 (Feb. 3,
    1994)] (noting history of area where defendants were stopped is
    relevant factor in "reasonable suspicion" calculus), we believe
    the district court supportably found that these agents reasonably
    harbored a justifiable concern for their personal safety and/or
    the safety of airline passengers, sufficient to warrant the pat-
    down frisk for weapons and for any explosives which may have
    passed undetected through the INS checkpoint.

    14