In 1972, the headquarters of the Democratic National Committee, then located on the sixth floor of the Watergate Office Building, was burglarized; private campaign documents were photographed and telephones were wiretapped. The U.S. Senate investigation into the burglary revealed that high officials in the administration of President Richard Nixon had ordered the break-in and later tried to cover up their involvement. Additional crimes were also uncovered. The Watergate scandal, named after the complex, resulted in Nixon's resignation on August 9, 1974.