FBI Informant Says Agents Missed Chance to Stop 9/11 Ringleader Mohammed Atta

On the eve of the eight year anniversary of the 9/11 attacks, an FBI informant who infiltrated alleged terrorist cells in the U.S. tells ABC News the FBI missed a chance to stop the al Qaeda plot because they focused more on undercover stings than on the man who would later become known as 9/11 ringleader Mohammed Atta...ABCNews