20 hours ago · Harry S. Truman (May 8, 1884 – December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. Serving as vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt. Truman implemented the Marshall Plan in the wake of World War II to rebuild the economy of Western Europe and established both the …