Former FBI Agent Ali Soufan has just released his memoir called
"The Black Banners: The Inside Story of 9/11 and the War Against Al Qaeda" It has been heavily edited by the CIA. He was an American Arabic speaking counterterrorism agent involved in tracking down al quaeda from 1997-2005. He said that if the communication had been better between the CIA and FBI they could have stopped some of the terrorists involved in 9/11 and arrested them... he knew who they were.
In the last week he was interviewed on CBS Sixty Minutes and last night he was on Frontline. He had interviewed radical Islamicists hundreds of times without using torture - at Gitmo, in Yemen, In Afghanistan, and in Iraq. He opposes the techniques used on Abu Zubaydah and others not on moral grounds but because he believes they were totally ineffective. They get the prisoner to tell you whatever he thinks you want to hear. He has already told this to congress and resigned from the FBI because of it.
Watching this guy sent chills down my spine.
More here:
http://www.bbc.co.uk/news/world-us-canada-14891439 Ex-FBI interrogator 'gagged' over 9/11 backstory