North Korea unsuccessfully fired an intercontinental ballistic missile during a new salvo of launches Thursday, the South Korean military said, with Washington urging all nations to enforce sanctions on Pyongyang.Pyongyang has called the exercise, dubbed Vigilant Storm, "an aggressive and provocative military drill targeting the DPRK" and warned that, if it continues, Seoul and Washington will "pay the most horrible price in history."Tokyo initially said the missile had flown over Japan, prompting a "J-Alert" to be issued, but defense minister Yasukazu Hamada later said "the missile did not cross the Japanese archipelago, but disappeared over the Sea of Japan."Kim just has to give the thumbs up," a senior U.S. State Department official told CBS News.On October 4, North Korea fired a missile over Japan that also prompted evacuation warnings."