PANMUNJOM, SOUTH KOREA - FEBRUARY 27: South Korean soldiers stand guard at the border village of Panmunjom between South and North Korea at the Demilitarized Zone (DMZ) on February 27, 2013 in South Korea. North Korea confirmed it had successfully carried out an underground nuclear test on February 12, as a shallow earthquake with a magnitude of 4.9 was detected by several international monitoring agencies. (Photo by Chung Sung-Jun/Getty Images)
