John Kerry: China's approach to North Korea hasn't worked

U.S. Secretary of State John Kerry publicly took issue with China's policy towards its neighbor North Korea on Thursday and defended the U.S. handling of the crisis sparked by Pyongyang's nuclear test earlier this week.China is North Korea's only real ally in the Asia Pacific, and critics say it has failed to fully enforce international sanctions levied against the smaller country -- even though it voted for many of them -- sustaining a government that could otherwise likely collapse. Read more