Plenty more where that came from: North Korea has tested two more short-range missiles. Meanwhile, the UN Security Council is drafting a resolution against North Korea after the country tested a nuclear bomb Monday, which was comparable to the bombs that destroyed Hiroshima and Nagasaki. South Korea announced it will join a U.S.-led initiative to intercept North Korean ships that might be spreading weapons of mass destruction. North Korea warned South Korea that doing so would be considered an act of war. The blast was much more powerful than a test they conducted in 2006—it had the power of a 4.5-category earthquake. North Korea warned that it will also fire a short-range missile off its west coast. "Our army and people are fully ready for battle...against any reckless U.S. attempt for a pre-emptive attack," North Korea's news agency wrote. The resolution will contain "strong measures" against the nation.