The Fourth Amendment of the U.S. Constitution protects people from random and arbitrary stops and searches. The federal government claims the power to conduct certain kinds of warrantless stops within 100 miles of the U.S. U.S. Customs and Border Protection (CBP), the federal agency tasked with patrolling the U.S.border and areas that function like a border, claims a territorial reach much larger than you might imagine. A federal law says that, without a warrant, CBP can board vehicles and vesse