Mark Felt

Such was the mystery behind Deep Throat that years after Watergate the identity of the secret source who gave Bob Woodward, of The Washington Post, information that led to the downfall of President Richard Nixon was not known.

Vanity Fair's revelation that former FBI official W. Mark Felt was journalist Bob Woodward's famed anonymous source on the Watergate scandal. Woodward's subsequent confirmation filled in 'the last act, the last unknown fact' about the events that led to the downfall of President Richard Nixon.