N. Korea fires ballistic missile over Japan
Nuclear-armed North Korea fired a ballistic missile over Japan and into the Pacific Ocean on Tuesday in a major escalation by Pyongyang amid tensions over its weapons ambitions.Japanese Prime Minister Shinzo Abe said it was an "unprecedented, serious and grave threat" and called for an emergency UN Security Council meeting.The last time a North Korean rocket overflew Japan was in 2009, when Pyongyang said it was satellite launch.