The Pentagon Papers

In 1971, the New York Times published one of the most important leaks in US history - 7000 pages of top-secret Defence Department documents known as the Pentagon Papers.

The Papers were leaked by a Pentagon analyst called Daniel Ellsberg in an attempt to end the Vietnam War.

He tells his story to Witness.

(Photo: Daniel Ellsberg in the 1970s Credit: Hulton Archive / Getty Images)