After dismantling its plutonium-making reactor and blew up the main cooling tower at Yongbyon, North Korea expected to be removed from the US list of countries that support terrorism. That hasn't happened. Now, at Pyongyang's request, the International Atomic Energy Agency has removed seals and surveillance cameras from Yongbyon. North Korea says it'll go back to the business of making nuclear weapons. What's happened to what appeared to be progress in disarmament? Mike Chinoy is the author of Meltdown: the Inside Story of the North Korean Nuclear Crisis.