Jessica Stern and J.M. Berger on the genesis, evolution, and implications of Islamic State. Academy Award-winning director DA Pennebaker and DOC NYC artistic director Thom Powers on the first Documentary Preservation Summit at the IFC Center, and why documentaries are at risk. Irish author Colin Barrett with his award-winning debut collection of short stories, Young Skins. Miriam Pawel on the life and political career of Cesar Chavez.