Bob Woodward exposes one of the final pieces of the Richard Nixon puzzle in his new book The Last of the President's Men. Woodward reveals the untold story of Alexander Butterfield, the Nixon aide who disclosed the secret White House taping system that changed history and led to Nixon's resignation. In 46 hours of interviews with Butterfield, supported by thousands of documents, many of them original and not in the presidential archives and libraries, Woodward has uncovered new dimensions of Nixon's secrets, obsessions and deceptions. Butterfield provides the intimate details of what it was like working and living just feet from the most powerful man in the world as he sought to navigate the obligations to his president and the truth of Nixon's obsessions and deceptions.