Drug cartels plan to smuggle cocaine into Europe using a fleet of booby-trapped drone submarines that will explode if police try to board them. The unmanned craft will either detonate automatically or ...

As law enforcement became better at intercepting planes and high-speed boats, cartels turned to increasingly sophisticated narco submarines designed to avoid radar, sonar, and aerial surveillance.

For years, they were referred to in hushed tones simply as “Bigfoot” — a mythical creature rumored but never seen — but these days, the narco-submarines used by Colombia’s drug cartels have become ...