Nuclear Treaties 3 - Treaty on the Non-Proliferation of Nuclear Weapons
Following the Partial Test Ban Treaty and the Outer Space Treaty, the United States, the United Kingdom and the Soviet Union continued negotiating on nuclear issues. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was drafted and opened for signing in 1968. It went into effect in 1970, recognizing US, the UK, France, China and the Soviet Union as the only officially recognized states openly possessing nuclear weapons.