North Korea conducts third nuclear test, sparks condemnation

SEOUL (Reuters) - North Korea conducted its third-ever nuclear test on Tuesday, a move likely to anger its main ally China and increase international action against Pyongyang and its new young leader, Kim Jong-un. U.N. Secretary-General Ban Ki-moon condemned North Korea's test, saying it was a "clear and grave violation" of U.N. Security Council resolutions. South Korea said the size of the seismic activity indicated a nuclear explosion slightly larger than the North's two previous tests at 6-7 kilotons, although that is still relatively small. The Hiroshima bomb was around 20 kilotons. The U. ...