How does the Fourth Amendment apply to seizures that involve only a brief detention short of traditional arrest?

The Fourth Amendment "applies to all seizures of the person, including seizures that involve only a brief detention short of traditional arrest." United States v. Brignoni-Ponce, 422 U.S. 873, 878 (1975). Accordingly, the Fourth Amendment requires that such seizures be, at a minimum,"reasonable." Id. In order to satisfy the Fourth Amendment's strictures, an investigatory stop by the police may be made only if the officer in question has "a reasonable suspicion supported by articulable facts that criminal activity may be afoot . . . ." United States v. Sokolow, 490 U.S. 1, 7 (1989) (internal quotation omitted) (citing Terry v. Ohio, 392 U.S. 1, 30 (1968)).