Harry S. Truman was the 33rd President of the United States (1945–1953), taking office upon the death of Franklin D. Roosevelt. A World War I veteran, he assumed the presidency during the waning months of World War II and the beginning of the Cold War. He is known for implementing the Marshall Plan to rebuild the economy of Western Europe, for establishing the Truman Doctrine and NATO against Soviet and Chinese Communism, and for intervening in the Korean War. In domestic affairs, he was a moderate Democrat whose liberal proposals were a continuation of Franklin Roosevelt's New Deal, but the conservative-dominated Congress blocked most of them. He used the veto power 180 times, more than any president since and saw 12 overridden by Congress; only Grover Cleveland and Franklin D. Roosevelt used the veto more often, and only Gerald Ford and Andrew Johnson saw so many veto overrides. He is the only world leader to have used nuclear weapons in war. He desegregated the U.S. Armed Forces, supported a newly independent Israel and was a founder of the United Nations.