Missile Tests and Tension on the Korean Peninsula

The US and South Korea have raised their alert levels to counter North Korea's recent underground nuclear test and test-firing of short-range missiles. When the UN Security Council responded with tough talk, Pyongyang threatened "military action" if South Korea joined other nations in trying to stop North Korean shipping. Long-time Washington Post Northeast Asia Bureau Chief Selig Harrison heads the Center for International Policy's Asia Program and says he's "in touch" with North Korean diplomats at the UN.