South Korean protesters shout slogans during a rally against possible nuclear test by North Korea in Seoul, South Korea, Thursday, Jan. 31, 2013. North Korean leader Kim Jong Un convened top security and foreign affairs officials and ordered them to take "substantial and high-profile important state measures," state media said last Sunday, indicating that he plans to push forward with a threat to explode a nuclear device in defiance of the United Nations. The Korean letters read " Overthrow the pro-North Korea groups.". (AP Photo/Ahn Young-joon)