What did the CIA know ahead of 9/11?
Ali Soufan, former FBI agent and author of "The Black Banners: The Inside Story of 9/11 and the War Against al-Qaeda," talks with Rachel Maddow about the
Ali Soufan, former FBI agent and author of "The Black Banners: The Inside Story of 9/11 and the War Against al-Qaeda," talks with Rachel Maddow about the
