Government or official record
Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster
National Institute of Standards and Technology
Where this source supports the record
Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.
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Historic crimes & investigations · 11 September 2001Open article references →
The September 11 Attacks at the World Trade Center
World Trade Center attack and memorial site · United States
Why editors use it hereTechnical evidence on impacts, fireproofing, fire, evacuation, collapse, and code recommendations.
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Quick read
On 11 September 2001, al-Qaeda hijackers flew American Airlines Flight 11 and United Airlines Flight 175 into the World Trade Center's Twin Towers.
Reviewed 26 July 2026 -
Trigger and conditions
Flight 11 struck the North Tower at 8:46 a.m.
Reviewed 26 July 2026 -
Uncertainty
The New York victim count excludes the nineteen hijackers and is updated only if a newly identified death is officially attributed.
Reviewed 26 July 2026 -
Why it matters
September 11 joins mass murder, building failure under extraordinary attack, sacrifice, policy transformation, and long environmental illness.
Reviewed 26 July 2026
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Quick read