North Korean Maj. Kwak Chol-hui, deputy director of the National Defense Commission, attends a news conference in Pyongyang, North Korea, on Saturday, March 3, 2012, to discuss the current joint U.S.-South Korean war games, which the North says threatens regional peace and stability. (AP Photo/Kim Kwang Hyon)

Photo by: Kim Kwang Hyon

North Korean Maj. Kwak Chol-hui, deputy director of the National Defense Commission, attends a news conference in Pyongyang, North Korea, on Saturday, March 3, 2012, to discuss the current joint U.S.-South Korean war games, which the North says threatens regional peace and stability. (AP Photo/Kim Kwang Hyon)