North Korea’s apparent underground detonation of a nuclear bomb has elicited outrage around the world. Seismologists reported an event with the power of a quake measuring 4.5 on the Richter scale, and several external agencies confirm an explosion that likely resulted from a nuclear device. The explosion appears to have been more powerful than North Korea’s first nuclear test, in October 2006, and suggests that the rogue Communist nation is hardening its confrontational position against the outside world. An emergency session of the United Nations Security Council is being convened by Russia, which currently occupies its rotating presidency. American President Barack Obama described the event as a threat to international peace.