WET MANGROVES LINE the rivers that meet the ocean along Colombia’s Pacific coast. The dense tropical canopy beneath them makes for stifling heat—and the per fect cover from prying U.S. satellites. For the past 25 years, drug smugglers have hidden entire manufacturing operations beneath these trees. Not drug-manufacturing operations—they’re making submarines. In the middle of the jungle. And, for the first time ever, they’ve gone electric. Last summer, the Colombian military captured a drug sub powered by smaller, quieter electric engines and more than 100 batteries.
At the building sites, smugglers ferry in thousands of pounds of materia ls, a labor force, and, sometimes, Russian submarine designers. They construct subs up to 100 feet long, typically made of wood, fiberglass, and Kevlar to avoid radar detection, and capable of carrying…
