The United States foreign policy of the Dwight D. Eisenhower administration, from 1953 to 1961, focused on the Cold War. The United States built up a stockpile of nuclear weapons and nuclear delivery systems to deter to military threats while Dwight D. Eisenhower was the president of the United States. A major uprising broke out in Hungary in 1956; the Eisenhower administration did not become directly involved, but condemned the military response of the Soviet Union. As part of a move towards détente, Eisenhower sought to reach a nuclear test ban treaty with the Soviet Union, but the 1960 U-2 incident derailed a Cold War summit in Paris.