PANMUNJOM, SOUTH KOREA - DECEMBER 08: South Korean soldiers stand guard at the demilitarized zone of Panmunjom as the border town reopens following North Korea's attack on Yeonpyeong in late November, on December 8, 2010 in Panmunjom, South Korea. Dozens of artillery shells fired by North Korea struck the South Korean Island of Yeonpyeong on November 23, resulting in four deaths and further injuries, prompting return fire from South Korean troops. South Korea's new defense minister Kim Kwan-jin took office on December 4, vowing South Korea would launch air strikes on North Korea in the event of another attac

South Korean soldiers stand guard by buildings, where Military Armistice Committee meetings are held, at the border village of the Panmunjom, South Korea, Wednesday, Dec. 8, 2010. The top military leaders from the United States and South Korea were holding talks on the Korean peninsula's security worries on Wednesday, as North Korea was apparently holding its regular firing exercises

PANMUNJOM, SOUTH KOREA - DECEMBER 08: South Korean soldiers stand guard at the demilitarized zone of Panmunjom as the border town reopens following North Korea's attack on Yeonpyeong in late November, on December 8, 2010 in Panmunjom, South Korea

A South Korean soldier stands guard by a building, where Military Armistice Committee meetings are held, at the border village of the Panmunjom, South Korea, Wednesday, Dec. 8, 2010

PANMUNJOM, SOUTH KOREA - DECEMBER 08: A North Korean soldier stands guard as the border town reopens following North Korea's attack onYeonpyeong in late November, on December 8, 2010 in Panmunjom, South Korea. Dozens of artillery shells fired by North Korea struck the South Korean Island of Yeonpyeong on November 23, resulting in four deaths and further injuries, prompting return fire from South Korean troops. South Korea's new defense minister Kim Kwan-jin took office on December 4, vowing South Korea would launch air strikes on North Korea in the event of another attack

A North Korean soldier looks toward the South side at the truce village of Panmunjom in the Demilitarized Zone (DMZ) separating the two Koreas on December 8, 2010. US and South Korean military chiefs held talks on ways to deter North Korea without triggering a war, as a firing drill by the North briefly rattled Seoul's financial markets

A North Korean soldier looks toward the South side at the truce village of Panmunjom in the Demilitarized Zone (DMZ) separating the two Koreas on December 8, 2010

PANMUNJOM, SOUTH KOREA - DECEMBER 08: A South Korean soldier stands guard at the demilitarized zone of Panmunjom as the border town reopens following North Korea's attack on Yeonpyeong in late November, on December 8, 2010 in Panmunjom, South Korea

A North Korean soldier stands guard at the border village of the Panmunjom, South Korea, Wednesday, Dec. 8, 2010. The top military leaders from the United States and South Korea were holding talks on the Korean peninsula's security worries on Wednesday, as North Korea was apparently holding its regular firing exercises