Border Wars (2010)

In this episode of Border Wars, agents and officers struggle to stop cartels and illegal immigrants whove found weak spots in spite of increased fortification along the U.S.-Mexico Border. Four feet beneath Nogales, agents crawl through a claustrophobic drug smuggling tunnel, knowing they could come face to face with armed criminals. Near the Port of Entry, Nogales Rail Inspection Team is on high alert as a freight train full of new automobiles rumbles toward them. Trains, with infinite hiding places, are becoming a favorite place for cartels to stash drugs: If the officers arent careful, they could easily miss a load. In the desert, Border Patrols only dirt bike unit races after a group of illegal immigrants. But in this sprawling Indian Reservation, the agents will need skill - and luck - to catch them.