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Smuggler's Tunnel

An armed agent climbing through an underground tunnel. Four feet underneath Nogales, Arizona, Border Patrol agents rush to secure a drug smuggling tunnel.

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In this episode of Border Wars, agents and officers struggle to stop cartels and illegal immigrants who've found weak spots along the U.S.-Mexico Border despite increased fortification. Four feet beneath Nogales, agents crawl through a claustrophobic drug smuggling tunnel, with the chance of coming face to face with armed criminals.