Daniel Ellsberg was a strategic analyst with the RAND Corporation, and a defense department and state department official who served in Vietnam. He later revealed to the U.S. Senate and the press the Pentagon Papers, a 7,000 page top secret study of U.S. decision making in Vietnam from 1945 to 1968. For this he faced a trial and a sentence of 115 years in prison, but all charges were dismissed on grounds of gross governmental misconduct against him, which led to the conviction of a number of White House aids and figured in the impeachment proceedings against President Nixon.