On September 11, 2001, the following buildings were hit or severely damaged in the terrorist attacks:
- The North Tower (WTC 1) was hit by American Airlines Flight 11 at 8:46 a.m., striking floors 93 through 99. It collapsed at 10:28 a.m. after burning for 1 hour and 42 minutes
- The South Tower (WTC 2) was hit by United Airlines Flight 175 at 9:03 a.m., striking floors 77 through 85. It collapsed at 9:59 a.m. after burning for 56 minutes
- The Marriott Hotel (WTC 3), located at the base of the Twin Towers, was destroyed in the collapse of the towers
- Other World Trade Center buildings damaged or destroyed by debris and fires include WTC 4 (South Plaza building), WTC 5, WTC 6 (U.S. Customs building), and WTC 7, which collapsed later at 5:21 p.m. due to fires ignited by debris from the North Tower
- The St. Nicholas Greek Orthodox Church, just south of WTC 2, was completely destroyed by debris
- The Pentagon was hit by American Airlines Flight 77 at 9:37 a.m., causing the collapse of the western face of the building
- The Verizon Building and several buildings in the World Financial Center complex suffered structural damage from debris
- The Deutsche Bank Building and 90 West Street were also damaged severely and later deconstructed or repaired
Additionally, United Airlines Flight 93 crashed in Pennsylvania at 10:03 a.m. after passengers intervened; its intended target was believed to be either the U.S. Capitol or the White House
. In summary, the primary buildings hit were the North and South Towers of the World Trade Center and the Pentagon, with extensive damage to surrounding structures in Lower Manhattan due to the towers' collapse and resulting debris
