After Weldon's assertions were disputed, Lt. Col. Anthony Shaffer, a member of the Able Danger team, identified himself as Weldon's source. Shaffer claimed that he alerted the FBI in September 2000 about the information uncovered by the secret military unit "Able Danger," but he alleges three meetings he set up with bureau officials were blocked by military lawyers. Shaffer, who at the time worked for the Defense Intelligence Agency, claims he communicated to members of the 9/11 Commission that Able Danger had identified two of the three cells responsible for 9/11 prior to the attacks, but the Commission did not include this information in their final report.[25]
Shaffer's lawyer, Mark Zaid, has revealed that Shaffer had been placed on paid administrative leave for what he called "petty and frivolous" reasons and had his security clearance suspended in March 2004, following a dispute over travel mileage expenses and personal use of a work cell phone.[26]
As Lt. Col. Shaffer received a memorandum of OPCON status from Joint Task Force (JTF) 121, confirming his attachment to this element 1 November through 1 December 2004, and participating in the 75th Ranger Regiment's nighttime air assault of 11 November 2003, the controversy of his wearing the 75th Ranger Regiment patch as his "combat patch" is closed in his favor. In the Army Reserve, LtCol Shaffer is now assigned as the G6 of the 94th Division (Prov), Ft. Lee, VA.
Congressman Weldon asked for a new probe into the activities undertaken to silence Lt. Col Shaffer from publicly commenting on Able Danger and Able Danger's identification of the 9/11 hijackers. Weldon called the activities "a deliberate campaign of character assassination."[27]
Shaffer has also told the story of Central Intelligence Agency (CIA) opposition to Able Danger, prior to 9/11, based on the view Able Danger was encroaching on CIA turf. According to Shaffer, the CIA representative said, "I clearly understand. We're going after the leadership. You guys are going after the body. But, it doesn't matter. The bottom line is, CIA will never give you the best information from "Alex Base" or anywhere else. CIA will never provide that to you because if you were successful in your effort to target Al Qaeda, you will steal our thunder. Therefore, we will not support this."[28]