 North Korea joined the Nuclear Non-Proliferation Treaty (NPT) as a non-nuclear weapons state in 1985, and North and South Korean talks begun in 1990 resulted in a 1992 Denuclearization Statement.However, US intelligence photos in early 1993 led the International Atomic Energy Agency (IAEA) to demand special inspection of the North's nuclear facilities, which prompted Kim Il Sung's March 1993 announcement of North Korea's withdrawal from the NPT.UN Security Council resolution 825 from May 11, 1993, urged North Korea to cooperate with the IAEA and to implement the 1992 North-South Denuclearization Statement.