Victims of Terrorist Attack on the Pentagon Memorial is a memorial over a group burial site at Arlington National Cemetery in the United States . It commemorates the victims of the Pentagon , which was struck by al-Qaeda terrorists as part of the September 11 attacks . The memorial specifically honors the five individuals for whom no identifiable remains were found . However , a portion of the remains of 25 other victims are buried at the site . The names of the 115 Pentagon employees and 10 contractors in the building , as well as the 53 passengers and six crew members aboard American Airlines Flight 77 ( which crashed into the building ) are inscribed on the memorial . After the 2001 terrorist attack on the Pentagon , Arlington National Cemetery Superintendent John C. Metzler , Jr. realized that there was a strong likelihood that many of the victims might not have their remains identified , while other remains might be commingled . Many of the victims would be military personnel whose families could choose to have their loved ones buried at Arlington . This would necessitate a group burial at the cemetery , and an appropriate monument to mark the grave
American Airlines Flight 77
American Airlines Flight 77
Victims of Terrorist Attack on the Pentagon Memorial