The U.S. Border Patrol operates a secretive nationwide surveillance program using license plate readers and algorithms to monitor millions of American drivers' travel patterns. The system flags suspicious behavior based on routes taken, leading to traffic stops often under pretexts like speeding. Originally designed for border security, the program has expanded far into the U.S. interior, monitoring drivers in major cities like Chicago, Detroit, and Phoenix. The surveillance network collaborates with local law enforcement and uses AI to identify potential threats, raising constitutional concerns about mass surveillance of ordinary Americans without warrants or probable cause.