As the 50th anniversary of President John F. Kennedy's assassination approaches, persistent questions still remain. Bestselling author and former New York Times reporter Philip Shenon addresses those questions and more in his newest book A Cruel and Shocking Act: The Secret History of the Kennedy Assassination. Based on hundreds of interviews and unprecedented access to the surviving commission staffers, Shenon concludes that senior officials of the U.S. government, especially at the CIA, destroyed evidence and lied about the assassination and the events that led up to it. Chris Mondics of The Philadelphia Inquirer moderates this discussion with Shenon on November 18, 2013 at the National Constitution Center.