Though the committee concluded that claims about Able Danger were unfounded, two of the hijackers were known to the U.S. intelligence community before the Sept. 11 attacks. The two had been observed by the CIA attending a meeting with Al Qaeda operatives in Malaysia, but that information was not shared with other agencies in time to locate them after they had entered the United States and moved to San Diego.
Able Danger was the unclassified name given to a program launched in 1999 by the U.S. Special Operations Command as part of an effort to develop military plans targeting the leadership ranks of Al Qaeda and other terrorist networks.
Military analysts assigned to the effort did create charts with pictures of Al Qaeda operatives whose identities were known publicly at the time, the committee found. But the committee concluded that none of those charts depicted Atta, and that the claims of Weldon and others may have been caused by confusion.
One of the charts, titled "The Al Qaeda Network: Snapshots of Typical Operational Cells Associated With UBL [Usama bin Laden]," was attached to the letter sent to committee members last week by Sens. Pat Roberts (R-Kan.) and John D. "Jay" Rockefeller IV (D-W.Va.), the panel's leaders.
"One of these individuals depicted on the chart arguably looked like Mohammed Atta," the committee concluded. "In addition, the chart contained names of Al Qaeda associates that sound like Atta, as well as numerous variations of the common Arab name Mohammed."
The committee also suggested that officials' memories may have been clouded by the flurry of charts and photographs of Atta that surfaced after the attacks. The panel noted that a defense contractor that produced the chart at the center of the controversy subsequently created a follow-up chart, after the attacks, that did include Atta.
Atta, an Egyptian-born Islamic radical, was the ringleader of the Sept. 11 attacks and pilot of one of the planes that struck the World Trade Center.
In June 2005, Weldon generated controversy when he declared in a speech on the House floor and in a book released that month that he had met with Hadley at the White House shortly after the attacks and had given the national security official a copy of a chart showing that Atta had been identified by Able Danger.
But the committee concluded that the chart "was not a pre-9/11 chart" and that "at no time did Mr. Hadley ever see a chart with pre-9/11 data bearing Atta's picture or name as described by Congressman Weldon."