Troubling news from Asia: North Korea is trumpeting what it calls a “successful” underground nuclear test. The country’s state-run KCNA agency says the underground test, the second since October 2006, was “aimed at strengthening its [North Korea’s] self-defense nuclear deterrent in every way,” and that it was more powerful than the previous test. The UN Security Council has called an emergency meeting in response. The American and South Korean geological agencies both detected a seismic tremor early Monday indicating a nuclear explosion. President Obama has since condemned the test in a statement. "The danger posed by North Korea's threatening activities warrants action by the international community," he said. "We have been and will continue working with our allies and partners in the six-party talks as well as other members of the UN Security Council in the days ahead."