The 9/11 commission relied heavily on the FBI’s PENTTBOM investigation – Google Search https://www.google.com/search?q=The+9%2F11+commission+relied+heavily+on+the+FBI%27s+PENTTBOM+investigation&rlz=1C1ONGR_enUS1133US1133&oq=The+9%2F11+commission+relied+heavily+on+the+FBI%27s+PENTTBOM+investigation&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRiPAtIBCTI4MTE3ajBqN6gCCLACAfEFTd7KTKXepoc&sourceid=chrome&source=chrome.ob&ie=UTF-8