November 22 marks the 50th anniversary of the assassination of President Kennedy, and questions have haunted our nation since: Was there a single gunman? Was Lee Harvey Oswald part of a conspiracy? Did the Warren Commission discover the whole truth of what happened? Investigative journalist Philip Shenon looks into these questions and provides many of the answers. His book A Cruel and Shocking Act: A Secret History of the Kennedy Assassination discloses information that was withheld from the Warren Commission by the CIA, FBI and others in power in Washington. Shenon also argues that Chief Justice Earl Warren was more committed to protecting the Kennedy family than getting to the full truth about what happened on that tragic day.