North Korean Foreign Minister Pak Ui Chun attends the 19th ASEAN Regional Forum Retreat in Phnom Penh, Cambodia, Thursday, July 12, 2012. North Korea released a statement later Thursday at the Association of Southeast Asian Nations' annual conference in Cambodia saying Washington's "never-ending nuclear threat" against the North has forced Pyongyang to build atomic weapons. (AP Photo/Sakchai Lalit)