Nuclear Weapons programs that began before 1970 when the Nuclear Non-Proliferation Treaty (NPT) came into force, succeeded, and are still ongoing The United States Russia The United Kingdom France China Israel India Programs that essentially ended by the time NPT started Australia Egypt Sweden Canada Programs that ended after 1970 Argentina Brazil Romania South Africa South Korea Spain Switzerland Taiwan Yugoslavia Intentions suspected but no nuclear weapons program identified Algeria Syria

Programs that started after 1970 and:    Succeeded and are ongoing Pakistan    Are suspected to be actively seeking nuclear weapons North Korea Iran    Are now ended Libya Iraq Factions within advocated for or sought nuclear weapons, but these ambitions ended by the time NPT started Italy Japan Germany Norway Inherited nuclear weapons, but now a non-nuclear weapon state party to the NPT Belarus Kazakhstan Ukraine

Please note:

• No evidence exists of an Argentine nuclear weapons program, but suspicions remain that one existed.
• Spain, which had a military dictatorship, developed unsafeguarded nulcear facilities during the 1960s and 1970s. U.S. officials said in the late 1980s that they suspected that Spain had nuclear weapons ambitions or a program.
• Nigeria and Indonesia are occasionally named as countries that had nuclear weapons intentions, but these claims have not been substantiated.