NPR's Deborah Amos, author of Eclipse of the Sunnis, talks to Melissa Block about the extremist vision for establishing a new Sunni caliphate, as well as what it might look like if a group like ISIS managed to do so.
Copyright 2014 NPR. To see more, visit http://www.npr.org/.
One big question about Iraq concerns it's neighbor to the east, Iran. What will Tehran do in the face of the ISIS offensive? And do Iran and the United States share sufficient common interests to actually cooperate over Iraq? Well, joining us from Tehran is Thomas Erdbrink, who is the New York Times bureau chief there. And tell us, how worried are the Iranians, first, about what ISIS has done in Iraq?