The air traffic control tower at Washington Dulles International Airport notifies Inova Fairfax Hospital—the largest hospital in Northern Virginia—that a hijacked aircraft is missing. It passes this information to Dr. Thomas Mayer, the chair of the hospital’s emergency department. [Goldberg et al., 2007, pp. 117] At around 9:32 a.m., air traffic controllers at the FAA’s terminal control facility at Dulles had “observed a primary radar target,” later determined to be Flight 77, “tracking eastbound at a high rate of speed” (see 9:32 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 25; 9/11 Commission, 8/26/2004, pp. 33] Mayer will later recall: “We knew that something was headed towards the national capital area. We didn’t know where. But we knew we needed to get ready. So we immediately went on disaster planning mode.” [Goldberg et al., 2007, pp. 117] The Arlington County After-Action Report indicates the hospital in fact initiates its disaster plan earlier than Mayer suggests, stating: “Inova Fairfax Hospital activated its disaster plan following reports of the World Trade Center attacks. Subsequently, the hospital received emergency notification of a missing airliner from the Washington Dulles International Airport tower.” The hospital cancels elective surgeries until 6:00 p.m. and makes eight trauma teams available within 20 minutes. The regular emergency room is relocated to an alternate site, and nearly 100 nurses and doctors prepare to respond in the event of an attack in the Washington Metropolitan Area. [US Department of Health and Human Services, 7/2002, pp. B3 ] Due to the strategic importance of the region, Inova Fairfax and the other hospitals and clinics in the Washington area are particularly well prepared for mass casualty incidents. They regularly conduct drills to practice for chemical or biological attacks. [Goldberg et al., 2007, pp. 115]