Destroyed Flight Evidence
Destruction of Evidence of the Commandeered Flights
Of the four flights commandeered on 9/11/01, Flights 11, 175, 77, and 93, there is virtually no evidence in the public domain that can provide definitive answers to their fate. This is because the evidence has either been suppressed or destroyed by those who controlled the response to and investigation of this vast crime.
Taped Destroyed by FAA
While most of the incidental evidence, such as recordings of communications with pilots of the doomed aircraft, remains in the category of missing, with no one held to account for it, some such evidence is now known to be destroyed. A report issued on May 6, 2004 at the request of Senator John McCain concluded that an audiotape recording of communications with commandeered planes on 9/11/01 was destroyed by FAA managers. 1
The tape contained a one-hour interview, taken on the day of the attack, with six controllers who tracked two of the planes on 9/11/01. The controllers gave detailed accounts of what events they recalled just hours earlier. An FAA official described in the report as a quality assurance manager crushed the cassette, then cut up the tape and dropped pieces into multiple trash cans. 2
Destruction of the Aircraft and Passengers
Most of the direct physical evidence from the four flights, such as pieces of the aircraft, and corpses and effects of the passengers, was destroyed or degraded beyond recognition by the attack itself. FEMA documented a few pieces of Flights 11 and 175 that exited the towers, but it appears that none of this evidence was examined or saved for study, in contrast to normal practice in air disaster investigations.
There appears to be no public information on the fate or status of the bulk of the aircraft remains, which remained trapped in the towers. Given the thoroughness of the destruction of the towers, those remains were probably shredded and distributed throughout the rubble of Ground Zero.
2. F.A.A. Official Scrapped Tape of 9/11 Controllers' Statements, New York Times, 5/6/04 [cached]