25. Harry Truman
Harry Truman – to date the last American president not to have graduated from college – followed the only man elected four times to the office when FDR died in April, 1945. He presided over the end of World War II, the beginning of the Cold War, the Korean War, and the labor strife which began as industry began to retool for commercial production. Among the decisions which emanated from his office were the atomic bombing of Japan, the authorization of the Berlin Airlift, the firing of the insubordinate but popular Douglas MacArthur, and Executive Order 9981, which ordered the full integration of the United States military.