What Countries Have Signed The Nuclear Non-Proliferation Treaty?

What Countries Have Signed The Nuclear Non-Proliferation Treaty? Treaty on the Non-Proliferation of Nuclear Weapons, also called Nuclear Non-Proliferation Treaty, agreement of July 1, 1968, signed by the United Kingdom, the United States, the Soviet Union, and 59 other states, under which the three major signatories, which possessed nuclear weapons, agreed not to assist other