Cartel

Having followed Mexico's cartels for years, border security expert Sylvia Longmire takes us deep into the heart of their world to witness a dangerous underground that will do whatever it takes to deliver drugs to a willing audience of American consumers. The cartels have grown increasingly bold in recent years, building submarines to move up the coast of Central America and digging elaborate tunnels that both move drugs north and carry cash and U.S. high-powered assault weapons back to fuel the