W. Mark Felt, now 91, has come forward claiming he was perhaps the most famous anonymous source in press history: 'Deep Throat.' 'Deep Throat' helped Bob Woodward and Carl Bernstein unravel President Nixon's Watergate cover-up in the early 70s.

Felt was the FBI's second in command at the time of the Watergate break-in. He told 'Vanity Fair' that he was 'Deep Throat,' a secret he kept even from his own family until 2002.

For years, 'Deep Throat' has remained silent. Woodward and Bernstein said they would only reveal the identity of their secret source after he died.

According to the article in 'Vanity Fair,' Felt was not proud of his role in helping reveal the crimes of the Nixon White House. 'I don't think [being Deep Throat] was anything to be proud of. You (should) not leak information to anyone,' Felt once told his son.

Felt's family disagreed, saying he should receive credit for his actions while he is still alive. He now lives in Santa Rose, California with his daughter Joan.

Many people have been touted as candidates to be 'Deep Throat' including Alexander Haig, Pat Buchanan, John Dean, Assistant Attorney General Henry Peterson and even Secretary of State Henry Kissinger. Others felt that 'Deep Throat' was more than one person and that the two 'Washington Post' reporters made it seem like one informant to protect their sources.

The name 'Deep Throat' comes from the famous porn film of the same name that swept the country in the early 70s. Woodward and Bernstein's book, 'All the President's Men' became a best seller and was later made into a movie starring Robert Redford and Dustin Hoffman.

Regardless of his real identity, one thing is certain: 'Deep Throat' played a vital role in unraveling the Watergate scandal and Americans owe him a debt of gratitude for it.