A nuclear-powered underwater drone is something the U.S. knew the Russians were working on. A computer simulation shows a Russian nuclear-powered underwater drone being released by a submarine. (RU-RTR Russian Television via Associated Press)While the goal of submarines is to be as quiet as possible, the Status-6 wouldn't need to be, due to its speed. President Vladimir Putin declared Thursday that Russia has developed a range of new nuclear weapons, claiming they can't be intercepted. But the Pentagon told Reuters on Thursday they had been keeping an eye on Russian weapons development.

Source: CBC News March 02, 2018 09:00 UTC