History & Asbestos Use
Built between 1941 and 1943 in just 16 months, the Pentagon's rapid wartime construction relied heavily on asbestos-containing fireproofing, insulation, and building materials standard for the era. The 6.5-million-square-foot building has undergone continuous renovation since its construction, with major asbestos abatement projects occurring during the Pentagon Renovation Program that began in the 1990s. The September 11, 2001 attack caused additional asbestos exposure during rescue and reconstruction.