Ali H. Soufan
Ali H. Soufan is a Lebanese-American former FBI agent who was involved in a number of high-profile anti-terrorism cases both in the United States and around the world. A 'New Yorker' article in 2006 described Soufan as coming closer than anyone to preventing the September 11 attacks, even implying that he would have succeeded had the CIA been willing to share information with him. Wikipedia*
On the C-SPAN Networks:
Ali H. Soufan has four videos in the C-SPAN Video Library; the first appearance was a 2009 Senate Committee as a Supervisory Special Agent for the Federal Bureau of Investigation. Most common tag: Terrorism.