On Sept 9, the anniversary of the communist regime, a 2.5 mile in diameter mushroom cloud was spotted over N Korea near a ballistic missile base.The explosion was big enough to leave a crater visible from space.It supposedly wasn't a nuclear blast, so I'm hoping they had an accident and blew themselves up.
http://edition.cnn.com/2004/WORLD/asiapcf/...t.ap/index.html