FRONTLINE reveals 9/11's unprecedented yet largely invisible legacy: the creation of a vast maze of clandestine government and private agencies designed to hunt terrorists and prevent future attacks on the U.S.
Aired:
| Expires: | Runtime: 53m 41s
You are leaving GBH.org
You are leaving gbh.org and going to a web page that is not owned by GBH. If you are streaming, your experience will be interrupted.