Victims of Terrorist Attack on the Pentagon Memorial excluded from the burial so that there was no possibility that any terrorist remains were included. These terrorist and commingled remains were turned over to the Federal Bureau of Investigation (FBI) in February 2002. The FBI said the remains were "disposed of in a dignified manner'", although a very small amount of suspected terrorist remains were retained to aid in later criminal prosecutions. The Victims of Terrorist Attack on the Pentagon Memorial was dedicated on September 12, 2002. A funeral service for the 30 victims was held at the Arlington Memorial Amphitheater, the first time the amphitheater had held such
The Pentagon Construction was completed January 15, 1943. Soil conditions of the siteon the Potomac River floodplainpresented challenges, as did the varying elevations across the site, which ranged from 10 to 40 feet () above sea level. Two retaining walls were built to compensate for the elevation variations, and cast-in-place (Franki) piles were used to deal with the soil conditions. Construction of the Pentagon was completed in approximately 16 months at a total cost of $83 million. The building is approximately tall, and each of the five sides of the building is long. The building was built one wing at a time;