South Korean soldiers conduct an exercise near the DMZ amid North Korea’s nuclear provocation

South Korean Army soldiers conduct an exercise near the demilitarized zone of Panmunjom in Paju, South Korea, Tuesday, Feb. 12, 2013. North Korea defied U.N. warnings Tuesday by conducting an underground nuclear test in the remote, snowy northeast in what could be a crucial step toward its goal of building a bomb small enough to be fitted on a missile capable of striking the United States. <AP Photo/Ahn Young-joon>