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Background Attack Aftermath Evidence Misinformation Analysis Memorial

The Evidence

Destroyed, Missing, and Surviving Evidence of the September 11th Attack

Evidence about the September 11th attacks can be divided into three categories: destroyed, missing, and surviving. The missing category includes officially secret information, since the existence of secret evidence and what it indicates cannot be verified.

A great deal of the evidence about the crimes of September 11th has either been destroyed or is unaccounted for. Indeed the event was and continues to be used to justify a campaign of secrecy never before seen in the United States, virtually eliminating public accountability of the very agencies who were entrusted to handle the evidence.

A review of the evidence shows a strong pattern of destruction or suppression of evidence, and the blocking of effective investigations, by the authorities. This is evident whether one looks at the flights, the World Trade Center, or the Pentagon.

Evidence Timeline

While a full accounting of the destruction of evidence from the attack would fill a volume were it ever to be told, the significant releases of evidence are few enough to be easily chronicled.

  • March, 2002: Five frames of video from a Pentagon security camera were leaked, feeding the no-Boeing theory of the Pentagon attack. Signs of forgery suggest that the frames were actually bait, intended to derail independent inquiry with red herrings.
  • May, 2002: Publication of FEMA's World Trade Center Building Performance Study provided evidence of a systematic effort to conceal and misrepresent the construction of the Twin Towers, while at the same time disclosing in its Appendix evidence suggestive of explosives.
  • November, 2002: Contents of suppressed audiotape of communications from Chief Oreo Palmer, a firefighter who reached the crash zone of the South Tower, were released.
  • August, 2003: Publication of the book Behind the Scenes: GROUND ZERO revealed New York City firefighter Nicholas DeMasi's account of the recovery of three of the four black boxes from the planes that crashed into the Twin Towers -- an account not acknowledged by the 9/11 Commission.
  • July 22, 2004: The Kean Commission published the 9/11 Commission Report , whose demonstrable falsehoods, omissions, contradictions, and changed timelines demonstrate a systematic cover-up.
  • August 12, 2005: New York Times announced the release of oral histories long suppressed by the New York City government.
  • June, 2005: NIST released the draft of its final report on the collapses of the Twin Towers. NIST's blatant evasion of its stated objective to "determine why and how WTC 1 and WTC 2 collapsed following the initial impacts of the aircraft" amounts to a de facto admission that the Towers did not collapse because of the impacts and fires.
  • May 16, 2006: The Department of Defense released videos from two Pentagon security cameras.
  • July, 2006: exhibits of the trial of Zacarias Moussaoui were published. They include a diagram of the location of Pentagon attack victims, and copies passenger lists for and detailed accounts of phone calls from the four commandeered jetliners.
  • August 11, 2006: The National Transportation Safety Board (NTSB) released full transcripts of the air traffic control recordings from the four flights commandered on 9/11/01. A set of eight NTSB documents were published by the National Security Archive on the gwu.edu website. 1   The transcripts include altitude profiles and ground track maps for all of the flights except United Flight 93.


1. Government Releases Detailed Information on 9/11 Crashes, National Security Archive, 8/11/06

page last modified: 2008-09-16