During a November 15, 2001, press briefing by Spencer Abraham, Secretary of Energy, and Tom Ridge, Director of Homeland Security Ridge confirmed a report published by The Times that the U.S. had captured nuclear blueprints in an al Qaeda guest house in Kabul.
David Rohde, writing for The New York Times News Service, reported on November 17, 2001, that in addition to nuclear plans, safe houses contained flight simulator programs, documents about the handling of biological and chemical weapons, and information about flight training schools in Florida.
[3] CNN claimed to have found and gone through the Kabul safe house used by Abu Khabbab, who they described as "Osama bin Laden's top chemical and biological weapons commander.
[24] Some Guantanamo captives faced the allegation that they stayed in Afghan guest houses that were not explicitly tied to terrorism.
"A Federal Bureau of Investigation source stated he met the detainee in July–August 2001 at the al Qaida guest house in Kabul, Afghanistan.