North Korea 'missiles readied' after US stealth flights
29 March 2013 Last updated at 23:33 GMT
North Korea's Kim Jong-un says he has ordered missile units to be on standby, ready to attack US bases in South Korea and the Pacific.
Russia and China have appealed for calm, following North Korea's "bellicose" reaction to US B-2 bomber training flights over South Korea.
Kim Ghattas reports from Washington.