Harry S. Truman was the 33rd president of the United States. He took office in 1945 after Franklin Roosevelt died. As president, Truman faced major decisions including dropping the atomic bombs on Japan to end WWII, starting NATO and the Marshall Plan to rebuild Europe, and fighting communism through policies like the Truman Doctrine. He won an unlikely reelection victory in 1948. During his second term, Truman sent troops to Korea and fired General MacArthur, faced accusations of communism from Senator McCarthy, and oversaw the rebuilding of the White House. After leaving office in 1953, Truman worked to establish his presidential library and later died in 1972.