when did the us sign the nuclear non-proliferation treaty
Treaty on the Non-Proliferation of Nuclear Weapons Five states are recognized by NPT as nuclear weapon states (NWS): China (signed 1992), France (1992), the Soviet Union (1968; obligations and rights now assumed by the Russian Federation), the United Kingdom (1968), and the United States (1968). These five nations are also the five permanent members of the United Nations Security Council.
NATO In 1948, European leaders met with US defence, military and diplomatic officials at the Pentagon, under US Secretary of State George C. Marshall's orders, exploring a framework for a new and unprecedented association.[13] Talks for a new military alliance resulted in the North Atlantic Treaty, which was signed by US President Harry S. Truman in Washington on 4 April 1949. It included the five Treaty of Brussels states plus the United States, Canada, Portugal, Italy, Norway, Denmark and Iceland.[14] The first NATO Secretary General, Lord Ismay, stated in 1949 that the organization's goal was "to keep the Russians out, the Americans in, and the Germans down".[15] Popular support for the Treaty was not unanimous, and some Icelanders participated in a pro-neutrality, anti-membership riot in March 1949. The creation of NATO can be seen as the primary institutional consequence of a school of thought called Atlanticism which stressed the importance of trans-Atlantic cooperation.[16]