Nuclear Weapons/Warheads: North Korea

North Korea has a longstanding nuclear program. In 2003, Pyongyang declared that it had a nuclear deterrent.

With 4 million tons in exploitable high-quality uranium, North Korea began its nuclear research program in the 1960s, using students who had trained in the Soviet Union. Pyongyang established a large research complex at Yongbyon, including a Soviet IRT-2M research reactor. The reactor was modernized by 1974 with an output of 8 MW, using 80 percent enriched fuel. A second...