The following excerpt is from U.S. v. Washington, 967 F.2d 596 (9th Cir. 1992):
Although each of these factors, viewed in isolation, is consistent with innocent activity, in the aggregate they suffice to ground a reasonable, articulable suspicion. See, e.g., United States v. Sokolow, 490 U.S. 1, 9 (1989).
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