The Nat Geo cameras roll as a specialized team of DEA agents hunt down cocaine submarines in Cartagena, a place perfectly situated between Colombia's Caribbean and Pacific coasts. From there, the team is in striking distance of the two ocean corridors used to sail toward American shores. Fully aware that they have to catch it before it sails, DEA sub-hunters go to the frontlines of today's Cocaine War in one of the most remote places on earth to catch an elusive cocaine submarine. (Source: National Geographic Channel)