1987—In 1986, the Supreme Court ruled in California v. Ciraolo that a person growing marijuana in his back yard does not have a reasonable expectation of privacy that protects his premises against inspection by police lawfully operating an aircraft at an altitude of 1,000 feet.  Exercising the illogic that earned her an appointment by President Clinton to the Eleventh Circuit in 1993, Florida justice Rosemary Barkett (in State v. Riley) rules that surveillance of a back-yard greenhouse by a helicopter lawfully flying at 400 feet violates the Fourth Amendment  because “[s]urveillance by helicopter is particularly likely to unreasonably intrude upon private activities.”  But the relevant question, as the Supreme Court makes clear in reversing Barkett (in Florida v. Riley), is whether the defendant had a reasonable expectation of privacy in the first place, and that question turns, under Ciraolo, on whether “helicopters flying at 400 feet are sufficiently rare in this country to lend substance to [the defendant’s] claim that he reasonably anticipated that his greenhouse would not be subject to observation from that altitude.”