FILE - In this Oct. 10, 2015, photo, missiles are paraded during a military parade during celebrations to mark the 70th anniversary of North Korea's Workers' Party. Skeptics of North Korea’s nuclear threat - and there are many - have long clung to two comforting thoughts: that while the North has the bomb, it doesn’t have a warhead small enough to put on a long-range rocket, much less a re-entry vehicle to keep that warhead from burning up in the atmosphere before it could reach a target like, as it has suggested before, Manhattan. North Korea on Tuesday, March 15, 2016, suggested it will soon show the world it has mastered both technologies. (AP Photo/Wong Maye-E, File)