At CBP Air and Marine, agents prepare to hit the skies to stop illegal immigrants and illicit drugs from entering the US.
(04:37)From the air and on the ground, three components of CBP defend one of the busiest border crossings in the US.
(03:00)In Nogales, Arizona, CBP officers prevent a wanted man from slipping across the border and uncover a shocking cartel smuggling.
(00:59)Agent Simon Keller's crew and horse patrols hike up the canyon in search of border crossers.
(02:59)At the port of entry, CBP agents hit upon a narcotics load stashed inside a silver pickup truck.
(03:00)From the air and on the ground, three components of CBP work 24/7 to defend a 51 kilometer long stretch of the border.
(00:46)CBP agents take off to patrol the Sonoran Desert with the help of a unmanned aircraft called The Predator.
(03:08)CBP officers are trained to identify impostors among millions of people that walk right up to America's front door.
(03:07)FOB agents work 24/7 in one of the most active and remote areas for drug traffic and illegal immigrants.
(02:39)Two CBP agents enter an abandoned silver mining town looking for drug carriers during the night.
(03:09)The Blackhawk crew helps ground agents to track down illegal immigrants during the night.
(02:41)FOB agents come out in force to patrol one of the most active trails at night.
(02:56)