Who killed JFK? Behind the scenes of Warren Commission

The mob did it. Or the CIA. Or Fidel Castro. Or Lyndon Johnson. Or the Soviets.

Half a century has passed since the assassination of President John F. Kennedy β€” one of the greatest crimes of the 20th century and the most abundant wellspring for conspiracy theorists in the history of the United States.

New book by author Philip Shenon goes behind the scenes of Warren Commission.