Today, North Korea's news agency announced the country had "successfully conducted one more underground nuclear test on May 25 as part of the measures to bolster up its nuclear deterrent for self-defense in every way as requested by its scientists and technicians." President Obama denounced the test, "North Korea's attempts to develop nuclear weapons, as well as its ballistic missile program, constitute a threat to international peace and security," as did China and Russia. The NY Times reports that a security expert "estimated the test had a power of one kiloton of explosives... If correct, that would be a fraction of the size of the blasts from American bombs that destroyed the Japanese cities of Hiroshima and Nagasaki in August, 1945 — themselves considered small by current standards." The United Nations Security Council will meet later today to discuss the test; according to Bloomberg News, "Japan and South Korea...called for the UN body to take action against North Korea." Back in April, North Korea launched a rocket, though claimed it was a satellite.