First a rocket launch, now a nuclear test. North Korean leader Kim Jong-un continues to defy U.N. resolutions and put everyone in the region on edge. This time, the nuclear detonation drew condemnation even from China, the hermit kingdom's only major ally, but it's not yet clear whether China will tighten sanctions. President Obama called the test “highly provocative,” one that “undermines regional stability.” World leaders of other nations echoed the United States’ outrage, with U.N. Secretary-General Ban Ki-moon denouncing it as a “clear and grave violation” of Security Council resolutions. The test appears to be North Korea's most powerful yet, but the country is still years away from being able to miniaturize devices for missiles.