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Former White House aide John Dean III is sworn in by Senate Watergate Committee Chairman Sam Ervin, D-N.C., in this June 25, 1973 photo. June 17, 2002 marks the 30th anniversary of the break-in at the Democratic Party headquarters in the Watergate Office Building in Washington, the "third rate crime" that cost President Richard Nixon the White House. Dean served 127 days in prison for his part in the Watergate scandal after testifying before the Senate about President Nixon's efforts to cover up a break-in at Democratic National Committee headquarters. Nixon branded him as a traitor after the testimony. (KEYSTONE/AP Photo/Str)