U.S. Border Patrol

The United States Border Patrol is an American federal law enforcement agency. Its mission is to detect and prevent illegal aliens, terrorists and terrorist weapons from entering the United States, and prevent illegal trafficking of people and contraband. Wikipedia*

On the C-SPAN Networks:
U.S. Border Patrol has hosted 2 events in the C-SPAN Video Library; the first program was a 1993 Congressional News Conference.