An Army intelligence officer, Lt. Col. Anthony Shaffer, says his unit, known as "Able Danger," identified four future Sept. 11 hijackers as al Qaeda members in the United States -- well before the 2001 attacks. He says the 9/11 Commission did not thoroughly investigate this data.
Lt. Col. Anthony Shaffer, oversaw the Army's "Able Danger" intelligence unit
Thomas Kean, chairman of the 9/11 Commission; former Republican governor of New Jersey
Harry "Skip" Brandon, former deputy assistant director in charge of counterterrorism and national security at the FBI; retired in 1993 after 23 years with the FBI; founding partner of Smith Brandon International, a defense and security consulting firm in Washington, D.C.
Tom Fitton, president of Judicial Watch