Two 9/11 Commission members, Timothy J. Roemer and John F. Lehman, both claimed not to have received any information on Able Danger. Following the GSN report, members of the 9/11 Commission began commenting on the information they had on Able Danger and Atta. Lee H. Hamilton, former Vice Chair of the 9/11 Commission, and Al Felzenberg, a former spokesman for the 9/11 Commission, both denied that the 9/11 Commission had any information on the identification of Mohamed Atta prior to the attacks. Hamilton told the media, "The Sept. 11 commission did not learn of any U.S. government knowledge prior to 9/11 of surveillance of Mohamed Atta or of his cell.... Had we learned of it obviously it would've been a major focus of our investigation." On August 12, 2005, Hamilton and former 9/11 Commission chairman Thomas Kean issued a statement in response to media inquiries about the commission's investigation of the Able Danger program. It stated the commission had been aware of the Able Danger program, and requested and obtained information about it from the Department of Defense, but none of the information provided had indicated the program had identified Atta or other 9/11 hijackers. They further stated that a claim about Atta having been identified prior to the attacks had been made to the 9/11 Commission on July 12, 2004 (just days before the commission's report was released), by a United States Navy officer employed at DOD, but that The interviewee had no documentary evidence and said he had only seen the document briefly some years earlier. He could not describe what information had led to this supposed Atta identification. Nor could the interviewee recall, when questioned, any details about how he thought a link to Atta could have been made by this DOD program in 2000 or any time before 9/11. The Department of Defense documents had mentioned nothing about Atta, nor had anyone come forward between September 2001 and July 2004 with any similar information. Weighing this with the information about Atta's actual activities, the negligible information available about Atta to other U.S. government agencies and the German government before 9/11, and the interviewer's assessment of the interviewee's knowledge and credibility, the Commission staff concluded that the officer's account was not sufficiently reliable to warrant revision of the report or further investigation. Congressman Curt Weldon issued a response to the 9/11 Commission clarifying the mission of Able