U.S. troops are sharing command stations and vehicles with civilian immigration authorities at the southern U.S. border under an emergency declaration from President Donald Trump. (AP video shot by Eu

Shouts ring out, an alert is sounded and a U.S. Border Patrol SUV races toward the wall — warning enough to send the man scrambling back over it, disappearing into Mexico. The sighting Tuesday was one of only two for the Army infantry unit patrolling this sector of the southern border,