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President Richard M. Nixon is shown pointing to the transcripts of the White House tapes in April 29, 1974, after he announced during a nationally-televised speech that he would turn over the transcripts to House impeachment invesigators. For nearly a quarter-century, only prosecutors and archivists have listened to 3,700 hours of conversations recorded secretly by Nixon. The government released 201 hours of the tapes Monday, Nov. 18, 1996 for public hearing, opening a rich vein of information for historians and Watergate addicts. (KEYSTONE/AP Photo/Str)