9/11 anniversary: Doctor saw shocking attack from plane - BBC News
Sept. 11, 2001: What happened at World Trade Center, Pentagon - The Washington Post
Remembering 9/11: Arkansas woman captured iconic photo of act of terror
The 9/11 Mystery Plane: And the Vanishing of America: Gaffney, Mark H., Griffin, Dr. David Ray: 9780979988608: Books - Amazon.ca
September 11 Hijackers Fast Facts | CNN
September 11 attacks | History, Summary, Location, Timeline, Casualties, & Facts | Britannica
20 Jahre 9/11: Der 11. September ist kein Tag wie jeder andere - Wien & NÖ-Ost | Der SONNTAG
Remembering 9/11 | National Archives
9/11: Six Tech Advances to Prevent Future Attacks
9/11: The Photographs That Moved Them Most | Time
9/11 Timeline: How the Day Unfolded - WSJ
Al Qaeda Won – Foreign Policy
United 93 (2006) - IMDb
First Plane Hitting the Towers, 2001 | National September 11 Memorial & Museum
Galerie: Die Erinnerung an den 11. September in Bildern | National Geographic
/cloudfront-us-east-1.images.arcpublishing.com/gray/SMXVOLBYCFDITMDX7FOQBMVOOQ.jpg "Appleton man flying into NYC on 9/11 recalls seeing plane hit Twin Towers: “I thought it was an accident.”")
Appleton man flying into NYC on 9/11 recalls seeing plane hit Twin Towers: “I thought it was an accident.”
Wreckage found in Manhattan was from 9/11 plane: Boeing | Reuters
9/11: Terror in den USA - Spur der Attentäter führt nach Hamburg | NDR.de - Geschichte - Chronologie
9/11: The Day of the Attacks - The Atlantic
Remembering the 9/11 Terrorist Attacks, 20 Years Later
Schweizer Firmen im Griff des Terrors - SWI swissinfo.ch
The September 11 terrorist attacks | Miller Center
The Story Behind TIME's Original 9/11 Cover | Time
