South Korean army soldiers walk on the empty road after South Korean vehicles which were refused for entry to North Korea at the customs, immigration and quarantine office in Paju, South Korea, near the border village of Panmunjom, Wednesday, April 3, 2013. North Korea on Wednesday barred South Korean workers from entering a jointly run factory park just over the heavily armed border in the North, officials in Seoul said, a day after Pyongyang announced it would restart its long-shuttered plutonium reactor and increase production of nuclear weapons material.(AP Photo/Ahn Young-joon)

Associated Press
South Korean army soldiers walk on the empty road after South Korean vehicles which were refused for entry to North Korea at the customs, immigration and quarantine office in Paju, South Korea, near the border village of Panmunjom, Wednesday, April 3, 2013. North Korea on Wednesday barred South Korean workers from entering a jointly run factory park just over the heavily armed border in the North, officials in Seoul said, a day after Pyongyang announced it would restart its long-shuttered plutonium reactor and increase production of nuclear weapons material.(AP Photo/Ahn Young-joon)
South Korean army soldiers walk on the empty road after South Korean vehicles which were refused for entry to North Korea at the customs, immigration and quarantine office in Paju, South Korea, near the border village of Panmunjom, Wednesday, April 3, 2013. North Korea on Wednesday barred South Korean workers from entering a jointly run factory park just over the heavily armed border in the North, officials in Seoul said, a day after Pyongyang announced it would restart its long-shuttered plutonium reactor and increase production of nuclear weapons material.(AP Photo/Ahn Young-joon)
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