FILE - In this July 30, 1953 black-and-white file photo, Commander-in-chief, United Nations Command, and U.S. Army Gen. Mark Clark signs the Military Armistice agreement at a base camp at Munsan-ni, Korea. Sixty years after it finished fighting in Korea, the U.S. is still struggling with two legacies that are reminders of the costs -- political, military and human -- that war can impose on the generations that follow. The first is the leading role that America still is committed to playing in defending South Korea should the 1950-53 Korean War re-ignite. (AP Photo, File)