Ohiocore

A military intelligence team repeatedly contacted the FBI in 2000 to warn about the existence of an American-based terrorist cell that included the ringleader of the Sept. 11 attacks, according to a veteran Army intelligence officer who said he had now decided to risk his career by discussing the information publicly. The officer, Lt. Col. Anthony Shaffer, said military lawyers later blocked the team from sharing any of its information with the FBI Colonel Shaffer said in an interview that the small, highly classified intelligence program known as Able Danger had identified by name the terrorist ringleader, Mohammed Atta, as well three of the other future hijackers by mid-2000, and had tried to arrange a meeting that summer with agents of the FBI's Washington field office to share the information.

The commission said in its final report last year that American intelligence agencies had not identified Mr. Atta as a terrorist before Sept. 11, 2001

Colonel Shaffer said that he had provided information about Able Danger and its identification of Mr. Atta in a private meeting in October 2003 with members of the Sept. 11 commission staff when they visited Afghanistan, where he was then serving.