South Korea Korea Clashes

South Korean border guards patrol the fence-line at the Imjingak Pavilion near the border village of Panmunjom in Paju, South Korea, Wednesday, Dec. 22, 2010. South Korea vowed Wednesday to "punish the enemy" as hundreds of troops, fighter jets, tanks and attack helicopters prepared massive new drills near the heavily armed border a month after a deadly North Korean artillery attack. (AP Photo/Wally Santana)