Pentagon 9/11: No-Plane / Missile Theory
Introduction
At 9:37 AM on September 11, 2001, a large aircraft struck the western face of the Pentagon near Arlington, Virginia. The impact and subsequent fire killed 184 people — 59 aboard the aircraft and 125 Pentagon employees — and caused the partial collapse of Wedge 1 of the building.
The no-plane theory holds that the aircraft was not American Airlines Flight 77 (a Boeing 757-200 carrying 58 passengers and 6 crew), and that the Pentagon was instead struck by a missile, a smaller drone aircraft, an A-3 Skywarrior, or some combination involving an internal explosion. The theory originated principally with French conspiracy author Thierry Meyssan, whose 2002 book L''Effroyable Imposture (The Big Lie) was published before American investigators had assembled and publicly shared the full evidence record. It has been refuted at length by the 9/11 Commission Report, the ASCE Pentagon Building Performance Report, and multiple independent forensic investigations.
This page examines the specific claims of the no-plane theory against the full evidence record.
The Evidence for Flight 77
The evidentiary record establishing that Flight 77 struck the Pentagon is extensive, multi-sourced, and mutually corroborating:
Flight data and voice recorders. The NTSB recovered Flight 77's flight data recorder (FDR) and cockpit voice recorder (CVR) from the Pentagon wreckage. The FDR data shows the aircraft's altitude, speed, heading, and control inputs in the minutes before impact, tracing the trajectory directly to the Pentagon. The CVR captured the final minutes of flight including the takeover. Both recorders were authenticated by NTSB and FBI investigators.
DNA identification of passengers and crew. The Armed Forces DNA Identification Laboratory identified the remains of all 58 passengers, 6 crew members, and all 5 hijackers from DNA evidence recovered at the Pentagon. The remains were identified by matching samples against reference DNA from family members.
Eyewitness testimony. The 9/11 Commission and independent investigators documented over 1,000 eyewitnesses who observed the aircraft on its final approach along Route 27 and into the Pentagon's western face. Witnesses include motorists, pedestrians, employees at the nearby Citgo gas station, Pentagon employees, and passengers in traffic along the approach path. Their descriptions consistently describe a large commercial aircraft, not a missile or small drone.
Physical aircraft debris. FBI and ASCE investigators recovered substantial aircraft debris from the Pentagon crash site: engine components (identified by part number as consistent with the CFM56 engines used on the 757's actual type, a CFM International powerplant), landing gear, fuselage fragments, seat components, and luggage. The recovered parts were physically matched by manufacturer records to the 757 airframe type.
Pentagon security camera footage. The Department of Defense released security camera footage showing the aircraft striking the western face. The footage does not provide a clear full-frame view of the aircraft prior to impact (the cameras were low-resolution and not positioned for optimal capture), but shows the aircraft's impact and fireball. This footage limitation was cited by early no-plane theorists as evidence of concealment; the FBI released additional footage from a Doubletree Hotel camera and a Virginia Department of Transportation camera subsequently.
ASCE Pentagon Building Performance Report. The American Society of Civil Engineers conducted an independent structural performance study of the Pentagon after the attack. The report documents the physical damage pattern — the punch-out hole in Ring C resulting from the aircraft's forward momentum, the wing-impact damage pattern, the column damage consistent with a large multi-engine aircraft — and explicitly states the evidence is consistent with a Boeing 757 impact at the observed approach angle and speed.
Specific No-Plane Claims Examined
"The hole was too small for a 757." The initial impact hole in the first-floor facade of Wedge 1 appeared to some early photographs to be approximately 18 feet wide — smaller than a 757's wingspan of 125 feet. This is a misunderstanding of aircraft impact physics: aircraft wings are not rigid impact tools. At impact velocities over 500 mph, wing structures disintegrate and are absorbed by the building rather than creating a clean wing-shaped hole. The ASCE report and independent engineering analyses explain that the physical damage pattern — damage to five rings of the building, structural column patterns, and the punch-out hole in Ring C — is consistent with a large multi-engine aircraft at the observed approach speed.
"No aircraft wreckage was visible." Early photographs circulated by no-plane theorists showed post-impact scenes where large aircraft components were not prominently visible. This reflects both the high-speed disintegration physics noted above and the selective nature of the photographs chosen. FBI, ASCE, and NTSB investigators documented recovered components by part number and structural analysis; the wreckage was present but often in fragmented form consistent with the high-energy impact.
"The Pentagon lawn was undamaged." Some theorists noted the intact condition of the lawn near the impact point as inconsistent with a low-flying 757. The 9/11 Commission and NTSB both addressed this: Flight 77's approach was nearly level (approximately 1–2 degrees above horizontal) at high speed, with the aircraft clipping light poles on Route 27 in the final seconds before impact. The relatively intact lawn reflects the very low descent angle on final approach.
"A missile hit the Pentagon." No missile type capable of producing the observed damage has been identified. The damage footprint — a punch-out hole through five rings of reinforced concrete, structural column damage over a broad area, and fire damage inconsistent with a missile warhead but consistent with 11,000 gallons of jet fuel — has no consistent analogue in any known missile system. No credible origin point, launch trajectory, or launch platform for such a missile has been documented.
"The hijackers could not fly a 757." The hijacker at the controls of Flight 77, Hani Hanjour, was indeed noted as a poor pilot in flight-school records. The 9/11 Commission addressed this directly: the final approach to the Pentagon required a descending spiral from altitude followed by a nearly level high-speed run — a maneuver that demanded skill but that investigators assessed was executable based on the flight data recorder record and flight simulator reconstructions. The difficulty of the maneuver does not imply it was impossible.
Thierry Meyssan and the Origin of the Theory
The no-plane theory originated primarily with Thierry Meyssan, a French author with no structural engineering, aviation, or forensic background, who published L''Effroyable Imposture in France in March 2002. The book was a bestseller in France before American investigators had publicly released the full evidence record. Meyssan argued from the initial post-impact photographs and the absence of early press coverage of aircraft debris that a missile or bomb had struck the building. Subsequent release of the full evidence — FDR data, DNA identifications, 1,000+ eyewitness accounts, aircraft part recoveries — directly contradicted his claims, but the book''s framing continued to circulate online independently of its evidentiary failures.
Why the Verdict Is "Debunked"
The no-plane theory fails against each independent category of evidence:
- Physical flight recorders (FDR + CVR) establish Flight 77's trajectory to the Pentagon.
- DNA identification establishes the death of all passengers, crew, and hijackers at the scene.
- Over 1,000 eyewitnesses describe a large commercial aircraft on the approach.
- Aircraft parts recovered from the scene were identified by manufacturer part numbers to the 757 type.
- The ASCE structural performance analysis is consistent with a large high-speed aircraft impact.
- No credible alternative (missile type, origin, trajectory) has been specified by theory proponents.
The theory originated before the full evidence record was public and has not been updated in light of that record.
What Would Change Our Verdict
- Recovery and authenticated analysis of a missile component inconsistent with aircraft debris from the known 757 inventory.
- Physical evidence of a second impact source in the Pentagon debris field.
- Recantation by the NTSB or Armed Forces DNA Identification Laboratory of the FDR or DNA findings with documented evidentiary basis.
Verdict
Debunked. The evidence that American Airlines Flight 77 struck the Pentagon on September 11, 2001 is extensive, multi-sourced, and mutually corroborating: flight recorders, DNA identification of all passengers and crew, over 1,000 eyewitnesses, recovered aircraft parts identified by component numbers, and structural performance analysis by the ASCE. No credible alternative has been specified. The theory originated before the full evidence record was public and has not been sustained by any component of that record.
Evidence Filters10
NTSB flight data recorder and cockpit voice recorder recovered
DebunkingStrongThe National Transportation Safety Board recovered Flight 77's flight data recorder (FDR) and cockpit voice recorder (CVR) from the Pentagon crash site. The FDR data shows the aircraft's altitude, speed, heading, and control inputs tracing directly to the Pentagon. Both recorders were authenticated by NTSB and FBI investigators.
DNA identification of all passengers, crew, and hijackers
DebunkingStrongThe Armed Forces DNA Identification Laboratory identified the remains of all 58 passengers, 6 crew members, and all 5 hijackers from DNA evidence recovered at the Pentagon. Identification was made by matching against reference DNA samples from family members. This establishes that Flight 77's occupants died at the Pentagon.
Over 1,000 eyewitnesses on the approach path
DebunkingStrongThe 9/11 Commission and independent investigators documented over 1,000 eyewitnesses who observed the aircraft along Route 27 and during final approach. Witnesses include motorists, pedestrians, Citgo gas station employees, Pentagon employees, and passing motorists. Their descriptions consistently describe a large commercial aircraft.
Aircraft parts identified by manufacturer component numbers
DebunkingStrongFBI and ASCE investigators recovered substantial aircraft debris from the Pentagon crash site including engine components (identified by component number as consistent with the CFM56-series engines on the 757 type), landing gear, fuselage fragments, seat components, and luggage. Parts were physically matched by manufacturer records.
ASCE Pentagon Building Performance Report structural analysis
DebunkingStrongThe American Society of Civil Engineers conducted an independent structural performance study of the Pentagon. The report documents that the physical damage pattern — punch-out hole in Ring C, wing-impact column damage, structural load distribution — is consistent with a Boeing 757 impact at the observed approach angle and speed. No inconsistency with the 757 hypothesis was found.
Aircraft impact physics explains "small hole" observation
DebunkingStrongAt impact velocities over 500 mph, aircraft wing structures disintegrate on contact with a reinforced concrete building rather than creating a clean wing-shaped hole. The ASCE report and independent engineering analyses confirm the physical damage pattern is consistent with a large multi-engine aircraft at observed speed; the "too-small hole" argument misapplies rigid-body impact assumptions.
No credible missile type, origin, or trajectory specified
DebunkingStrongNo-plane proponents have not specified a missile type capable of producing the observed damage, a credible launch platform, or a launch trajectory consistent with eyewitness sightlines and radar data. The damage pattern — five rings penetrated, large fuel fire, broad column damage — has no analogue in any known missile system.
Theory originated with Thierry Meyssan before evidence record was complete
Debunking*L'Effroyable Imposture* (Meyssan, 2002) was published before American investigators had publicly released FDR data, DNA identifications, or complete physical evidence documentation. The book's arguments were constructed from initial post-impact photographs and the relative absence of early debris discussion in press accounts.
Limited initial security camera footage cited as evidence of concealment
SupportingWeakEarly security camera footage released by the DoD showed a limited view of the impact. No-plane theorists cited the limited camera coverage as evidence of concealment. The FBI subsequently released additional footage from a Doubletree Hotel camera and a Virginia DOT camera. Camera limitations reflect placement, not a cover-up.
Rebuttal
The initial footage limitation is real and was poorly explained in the immediate aftermath. The subsequent release of additional footage from multiple independent camera sources — showing the impact and fireball consistent with a large aircraft — directly addresses the concealment framing.
Hani Hanjour flight skill concerns
SupportingWeakPre-9/11 flight school records documented concerns about Hanjour's piloting skills. Some no-plane theorists argue the approach maneuver was beyond his abilities. The 9/11 Commission addressed this: the final approach required skill, but investigators assessed it was executable based on FDR records and flight simulator reconstructions.
Rebuttal
Hanjour's documented poor skills are real. The 9/11 Commission's assessment — that the specific maneuver he executed was difficult but feasible based on the FDR record — was based on professional flight analysis, not minimisation. Difficulty does not imply impossibility.
Evidence Cited by Believers2
Limited initial security camera footage cited as evidence of concealment
SupportingWeakEarly security camera footage released by the DoD showed a limited view of the impact. No-plane theorists cited the limited camera coverage as evidence of concealment. The FBI subsequently released additional footage from a Doubletree Hotel camera and a Virginia DOT camera. Camera limitations reflect placement, not a cover-up.
Rebuttal
The initial footage limitation is real and was poorly explained in the immediate aftermath. The subsequent release of additional footage from multiple independent camera sources — showing the impact and fireball consistent with a large aircraft — directly addresses the concealment framing.
Hani Hanjour flight skill concerns
SupportingWeakPre-9/11 flight school records documented concerns about Hanjour's piloting skills. Some no-plane theorists argue the approach maneuver was beyond his abilities. The 9/11 Commission addressed this: the final approach required skill, but investigators assessed it was executable based on FDR records and flight simulator reconstructions.
Rebuttal
Hanjour's documented poor skills are real. The 9/11 Commission's assessment — that the specific maneuver he executed was difficult but feasible based on the FDR record — was based on professional flight analysis, not minimisation. Difficulty does not imply impossibility.
Counter-Evidence8
NTSB flight data recorder and cockpit voice recorder recovered
DebunkingStrongThe National Transportation Safety Board recovered Flight 77's flight data recorder (FDR) and cockpit voice recorder (CVR) from the Pentagon crash site. The FDR data shows the aircraft's altitude, speed, heading, and control inputs tracing directly to the Pentagon. Both recorders were authenticated by NTSB and FBI investigators.
DNA identification of all passengers, crew, and hijackers
DebunkingStrongThe Armed Forces DNA Identification Laboratory identified the remains of all 58 passengers, 6 crew members, and all 5 hijackers from DNA evidence recovered at the Pentagon. Identification was made by matching against reference DNA samples from family members. This establishes that Flight 77's occupants died at the Pentagon.
Over 1,000 eyewitnesses on the approach path
DebunkingStrongThe 9/11 Commission and independent investigators documented over 1,000 eyewitnesses who observed the aircraft along Route 27 and during final approach. Witnesses include motorists, pedestrians, Citgo gas station employees, Pentagon employees, and passing motorists. Their descriptions consistently describe a large commercial aircraft.
Aircraft parts identified by manufacturer component numbers
DebunkingStrongFBI and ASCE investigators recovered substantial aircraft debris from the Pentagon crash site including engine components (identified by component number as consistent with the CFM56-series engines on the 757 type), landing gear, fuselage fragments, seat components, and luggage. Parts were physically matched by manufacturer records.
ASCE Pentagon Building Performance Report structural analysis
DebunkingStrongThe American Society of Civil Engineers conducted an independent structural performance study of the Pentagon. The report documents that the physical damage pattern — punch-out hole in Ring C, wing-impact column damage, structural load distribution — is consistent with a Boeing 757 impact at the observed approach angle and speed. No inconsistency with the 757 hypothesis was found.
Aircraft impact physics explains "small hole" observation
DebunkingStrongAt impact velocities over 500 mph, aircraft wing structures disintegrate on contact with a reinforced concrete building rather than creating a clean wing-shaped hole. The ASCE report and independent engineering analyses confirm the physical damage pattern is consistent with a large multi-engine aircraft at observed speed; the "too-small hole" argument misapplies rigid-body impact assumptions.
No credible missile type, origin, or trajectory specified
DebunkingStrongNo-plane proponents have not specified a missile type capable of producing the observed damage, a credible launch platform, or a launch trajectory consistent with eyewitness sightlines and radar data. The damage pattern — five rings penetrated, large fuel fire, broad column damage — has no analogue in any known missile system.
Theory originated with Thierry Meyssan before evidence record was complete
Debunking*L'Effroyable Imposture* (Meyssan, 2002) was published before American investigators had publicly released FDR data, DNA identifications, or complete physical evidence documentation. The book's arguments were constructed from initial post-impact photographs and the relative absence of early debris discussion in press accounts.
Timeline
American Airlines Flight 77 strikes Pentagon
At 9:37 AM, hijackers fly American Airlines Flight 77 (a Boeing 757-200, 58 passengers, 6 crew) into the western face of the Pentagon at approximately 530 mph. The impact and fire kill 184 people and cause the partial collapse of Wedge 1. Hundreds of eyewitnesses observe the final approach along Route 27.
L'Effroyable Imposture published in France
Thierry Meyssan publishes *L'Effroyable Imposture* in France, arguing — before the full US evidence record is public — that no plane struck the Pentagon, based primarily on post-impact photographs. The book becomes a bestseller in France and seeds the no-plane theory internationally.
9/11 Commission Report addresses Pentagon evidence
The 9/11 Commission Report documents Flight 77's flight path, the recovered flight recorders, eyewitness accounts, and the physical evidence at the Pentagon. The Commission's findings establish the definitive official evidentiary record of the attack.
Source →Department of Defense releases additional Pentagon security footage
The DoD releases additional security camera footage from the Pentagon attack, including video from cameras that had not been publicly released. The footage shows the aircraft impact and resulting fireball, directly addressing the "no visible plane" framing of early no-plane theorists.
NTSB releases Flight 77 FDR animation
The National Transportation Safety Board releases an animation derived from Flight 77's flight data recorder, tracing the aircraft's final minutes including the approach trajectory directly to the Pentagon. The animation provides public access to the primary flight data.
Source →
Verdict
Extensive evidence establishes that American Airlines Flight 77 struck the Pentagon on September 11, 2001: the NTSB-recovered flight data recorder and cockpit voice recorder, DNA identification of all 58 passengers, 6 crew, and 5 hijackers by the Armed Forces DNA Identification Laboratory, testimony from over 1,000 eyewitnesses along the approach path, aircraft parts identified by manufacturer part numbers, and the ASCE Pentagon Building Performance Report confirming structural damage consistent with a large high-speed aircraft impact. No credible alternative (missile type, origin trajectory, or launch platform) has been identified by theory proponents.
Frequently Asked Questions
Why isn't a 757-shaped hole visible at the Pentagon?
Aircraft impact physics explain this. At impact velocities over 500 mph, aircraft wing structures do not function as rigid tools that punch clean wing-shaped holes. Wing structures disintegrate on contact with reinforced concrete. The ASCE Pentagon Building Performance Report documents the physical damage pattern — which is consistent with a large high-speed aircraft — and explains why the impact geometry does not produce a plane-shaped cutout.
Where was the aircraft wreckage?
FBI and ASCE investigators documented recovered aircraft components at the Pentagon crash site, including engine parts identified by component numbers to the CFM56-series engines used on the 757 type, landing gear, fuselage fragments, seat components, and luggage. At high-speed aircraft impacts, wreckage is fragmented and distributed throughout the debris field rather than remaining in large intact pieces.
What about the security camera footage — doesn't it show a missile?
The initial footage released by the Department of Defense was low-resolution and not positioned for clear aircraft capture before impact. The DoD subsequently released additional footage from a Doubletree Hotel camera and a Virginia DOT camera. The footage shows the impact and fireball consistent with a large aircraft. The limited camera coverage in the initial release was a factor in early no-plane arguments but was subsequently addressed by additional footage releases.
Could Hani Hanjour actually have flown the approach?
Hanjour's documented difficulties at US flight schools are real. The 9/11 Commission and NTSB addressed this directly: the final approach required a descending spiral and a nearly level high-speed run. Flight analysts reviewing the flight data recorder concluded the maneuver was demanding but executable and consistent with the recorded control inputs. The difficulty of the maneuver does not mean it was impossible, particularly for a hijacker willing to crash.
How were the passengers identified if no plane hit?
The Armed Forces DNA Identification Laboratory identified the remains of all 58 passengers, 6 crew members, and all 5 hijackers from DNA evidence recovered from the Pentagon crash site. Identifications were made by matching against reference DNA samples from family members. The DNA identifications directly establish that the occupants of Flight 77 died at the Pentagon.
Sources
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Further Reading
- bookL'Effroyable Imposture (The Big Lie) — Thierry Meyssan (2002)
- paperPentagon Building Performance Report — Paul Mlakar et al. (ASCE) (2003)
- bookThe 9/11 Commission Report — 9/11 Commission (2004)
- bookDebunking 9/11 Myths: Why Conspiracy Theories Can't Stand Up to the Facts — David Dunbar and Brad Reagan (eds.) (2006)