“This is one of the first terrorist groups saying, ‘You know what? We’re not going to hit and run, and we’re never going to participate in politics as you know it. We actually want to kill everyone who disagrees with us,’” counterterrorism expert Ali Soufan tells FRONTLINE in this excerpt from "The Rise of ISIS" (http://to.pbs.org/1wkM7vO).
Funding for FRONTLINE's YouTube channel is provided by the Knight Foundation. FRONTLINE is made possible by PBS and CPB. Major support is provided by The John D. and Catherine T. MacArthur Foundation. Additional support is provided by the Park Foundation, the Ford Foundation, the Wyncote Foundation and Jon and Jo Ann Hagler on behalf of the Jon L. Hagler Foundation.