This is the story of President Kennedy's assassination, told through the unique perspective of newly released government tapes, audio recordings from the Dallas Police, and through the eyes and radio recordings of reporters who were there that day.
For years the men of President John F Kennedy's Secret Service detail have kept silent about that terrible day in Dallas, but now they've gathered back at the scene of the assassination, and are speaking out for the first time.
Chiefs of staff from LBJ's Marvin Watson to Obama's Rahm Emanuel show why it is the toughest job in Washington. From 9/11 to sending soldiers into war, the chief is often the only other person in the room.
The chiefs of staff must be ready for anything: from containing scandals to managing first ladies to weighing the risks of trying to kill Osama Bin Laden.