Armed North Korean soldiers joke with Chinese tourists as they keep guard at Hwanggumpyong Island, near the North Korean town of Sinuiju and the Chinese border city of Dandong, May 1, 2012. The United States, South Korea, Japan and European nations have submitted to the U.N. Security Council's North Korea sanctions committee lists of individuals and firms they want blacklisted after Pyongyang's recent rocket launch, envoys said on Monday. REUTERS/Jacky Chen (NORTH KOREA - Tags: MILITARY POLITICS SOCIETY TPX IMAGES OF THE DAY)