Mark Felt, the man known as Deep Throat, the secret informant in the Watergate scandal that led to the downfall of president Richard Nixon in 1974, has died. He was 95. The news was brought in the Washington Post by Bob Woodward, one of the two Post journalists who exposed the Watergate affair. He kept his role secret for 33 years, not even telling his family. It was with Felt's crucial input that Woodward and Carl Bernstein could write a series of investigative scoops about the Nixon administration's involvement in the June 1972 burglary of the Democratic National Committee headquarters at the Watergate complex in the US capital.