Daniel Ellsberg, a former Defense Department analyst and Marine company commander, tells the story of how he came to leak 7,000 pages of top secret documents on the Vietnam War to the New York Times in 1971. Speaking directly to camera in this Voices series talk, Ellsberg walks through his own reversal, from a Pentagon insider who helped plan the war to a man willing to risk a life sentence to help end it, and lays out his account of how the leak fed into Nixon's resignation and the war's eventual close. He does not stop at 1971: recorded as the United States debates invading Iraq, he turns his own history into an argument, warning that another war built on selective intelligence would repeat the mistakes he spent the Pentagon Papers exposing. There is no reenactment or outside interview here, just Ellsberg's own recollection and reasoning, delivered as a single extended talk rather than a produced documentary.