how many nuclear weapons did the us have in 1960
By 1961, two more countries had developed and successfully tested nuclear weapons. United Kingdom had started its program during the Second World War in close co-operation with the United States, and the first British bomb was tested on October 3, 1952.On February 13, 1960, France followed suit.he five nuclear weapons states United States, Russia (former Soviet Union), United Kingdom, France and China, are the only countries allowed to have nuclear weapons according to the Non-Proliferation Treaty (NPT) from 1970. All members of the United Nations except Israel, India and Pakistan have signed the NPT.