Daniel Ellsberg speaks during an interview in Los Angeles on Sept. 23, 2009. (AP Photo / Nick Ut, File)

Daniel Ellsberg, the history-making whistleblower who by leaking the Pentagon Papers revealed longtime government doubts and deceit about the Vietnam War and inspired acts of retaliation by President Richard Nixon that helped lead to his resignation, has died.

He leaked the Pentagon Papers expediting the end of the Vietnam war, but Daniel Ellsberg now reveals another big secret in his new book, “The Doomsday Machine: Confessions of a Nuclear War Planner.”