Gina Kolata; 'Arbitrage'; 'Death and the Civil War'

New York Times medical reporter Gina Kolata describes a new discovery in genetics: just how genes are turned on and off and the implications for understanding disease. Director Nicholas Jarecki along with actors Richard Gere, Susan Sarandon, and Nate Parker introduce their movie, "Arbitrage." Ric Burns and author Drew Gilpin Faust discuss their new PBS film "Death and the Civil War," which looks at the conflict and its lasting effects.