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A CBP Border Patrol agent scans the area into Mexico with binoculars looking for illegal immigrants potentially staging to enter the U.S.
CBP Border Patrol agent does a pat down of a Mexican being returned to Mexico.
CBP Marine units patrol the southern most portion of the Rio Grande river in Texas.
A Border Patrol agent inspects a man-made tunnel near Nogales, Ariz. Such tunnels are used to transport drugs under the U.S. border. (photo by Josh Denmark)
CBP Border Patrol Marine units face toward Mexico to provide cover for other agents on the U.S. side of the river conducting an investigation.
High tech equipment that is mobile is used to see illegal immigrants attempting to cross into the U.S. giving Border Patrol agents an advantage in apprehending violaters.
The Air Support unit provides invaluable assistance to Border Patrol Officers on the ground for both operations and rescue.
"Dragging" wipes away any footprints or other signs that people are crossing a border road. Later the Border patrol will check for signs that people have crossed the road illegally heading into the U.S.
Border Patrol agent inspects a water drainage tunnel that spans from Nogales, Ariz. into Mexcio. (photo by Josh Denmark)
Often Border Patrol agents will patrol remote areas alone.