From CNN:
First on CNN: U.S. says North Korean submarine missing
The North Korean regime lost contact with one of its submarines earlier this week, three U.S. officials familiar with the latest information told CNN.
The U.S. military had been observing the submarine operate off North Korea's east coast when the vessel stopped, and U.S. spy satellites, aircraft and ships have been secretly watching for days as the North Korean navy searched for the missing sub.
The U.S. is unsure if the missing vessel is adrift under the sea or whether it has sunk, the officials said, but believes it suffered some type of failure during an exercise.
Tensions have heightened on the Korean peninsula following a fourth North Korean nuclear test and joint U.S.-South Korean military drills.
Just wonderful. As if they cannot get any crazier. I really feel sorry for their citizens - it will be amazing when the regime falls and they are allowed to find out that the rest of the world is not as evil as it is now portrayed.