On the morning of September 11, 2001, nineteen terrorists affiliated with al-Qaeda, an international Sunni Islamic movement headed by Osama bin Laden, hijacked four American commercial passenger planes from airports in the USA. The hijackers intentionally crashed two of the planes into the Twin Towers of the World Trade Center in New York City. The third plane crashed into the Pentagon, headquarters of the United States Department of Defense in Arlington, Virginia. The fourth plane was headed toward Washington, DC, but crashed in a field near Shanksville, Pennsylvania after passengers and members of the flight crew attempted to retake control.
This page is your starting place for finding facts and photos for buildings impacted by the September 11, 2001 terrorist attacks. In this index you'll find information about the architecture of damaged buildings, photographic records of the destruction, plans and models for reconstruction, and photos of September 11 monuments and memorials.
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 New York Before 9/11 |  The Pentagon in Arlington, Virginia |  Shanksville, Pennsylvania |  Rebuilding in New York |
 September 11 Monuments and Memorials |
- Graphic Index
- Text Index
