U.S. President <a href="https://en.wikipedia.org/wiki/Franklin_D._Roosevelt" id="mwyw" rel="mw:WikiLink" title="Franklin D. Roosevelt">Franklin D. Roosevelt</a> dies in office; Vice President <a href="https://en.wikipedia.org/wiki/Harry_S._Truman" id="mwzA" rel="mw:WikiLink" title="Harry S. Truman">Harry S. Truman</a> becomes President upon Roosevelt's death.