North Korean soldiers look at South Korea across the Korean Demilitarized Zone (DMZ), on December 22, 2011 in Panmunjom, South Korea. U.S. and South Korean defense intelligence reports today suggest that the transition of power in North Korea is going smoothly following the death of North Korean leader Kim Jong Il of a heart attack Saturday. His death has brought concerns about instability in the Korean Peninusla, with heavy attention being paid to the movements of the country's 1.2 million military personnel. State media has released imagery of North Korean's weeping and mourning at the main square in Pyongyang as citizens participate in an the state-wide 11-day mourning period culminating in a national memorial service December 28–29. (Photo by Chung Sung-Jun/Getty Images)

U.S. and South Korean soldiers stand guard at the border village of Panmunjom on December 22, 2011 in Panmunjom, South Korea. (Photo by Chung Sung-Jun/Getty Images)

North Korean soldiers on duty at Sinuiju, opposite the Chinese border city of Dandong on December 21, 2011 in Sinuiju, North Korea. Chinese Premier Wen Jiabao on December 21 visited the North Korean embassy in Beijing to offer his condolences on the death of Kim Jong-Il. (Photo by ChinaFotoPress/Getty Images)