FRONTLINE: The Enemy Within

Five years after 9/11, Pulitzer Prize-winning reporter Lowell Bergman investigates the domestic counterterrorism effort and asks whether we are better prepared to prevent another catastrophic attack. Through interviews with high-level sources from the FBI, Department of Defense and Homeland Security, and relying on previously undisclosed documents, Bergman reveals continued inter-agency rivalry, as well as troubling flaws in intelligence operations, that not only raise questions about what we actually know about the “enemy,” but also whether we have heightened our vulnerability to other threats.

A co-production of FRONTLINE with The New York Times. Produced by Lowell Bergman and Oriana Zill de Granados.