South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, Sunday, March 31, 2013. North Korea warned South Korea on Saturday that the Korean Peninsula had entered "a state of war" and threatened to shut down a border factory complex that's the last major symbol of inter-Korean cooperation. (AP Photo/Ahn Young-joon)

Associated Press
South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, Sunday, March 31, 2013. North Korea warned South Korea on Saturday that the Korean Peninsula had entered "a state of war" and threatened to shut down a border factory complex that's the last major symbol of inter-Korean cooperation. (AP Photo/Ahn Young-joon)
South Korean Army soldiers patrol along a barbed-wire fence near the border village of Panmunjom in Paju, South Korea, Sunday, March 31, 2013. North Korea warned South Korea on Saturday that the Korean Peninsula had entered "a state of war" and threatened to shut down a border factory complex that's the last major symbol of inter-Korean cooperation. (AP Photo/Ahn Young-joon)
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