9:38 a.m. September 11, 2001: FBI Agents Already at Military Building near Pentagon; Assist with Evacuation

A number of FBI agents are, for unknown reasons, already at the Navy Annex—a building near the Pentagon—when the Pentagon is hit, and help clear the Navy Annex when it is evacuated in response to the attack. [Naval Historical Center, 12/21/2001] The Navy Annex is a massive building located a few hundred yards uphill from the Pentagon. It has enough room for 6,000 employees. Currently, about 100 Navy personnel work in it, and most of the space is used by the Marine Corps. [American Forces Press Service, 9/24/2001; Goldberg et al., 2007, pp. 14; GlobalSecurity (.org), 5/7/2011]
Building Manager Sounds Fire Alarm, Starts Evacuation – Coneleous Alexander, a building manager at the Navy Annex, hears the explosion from the Pentagon attack (see 9:37 a.m. September 11, 2001). Alexander “knew immediately it was the Pentagon” that had been hit, he will later recall. He runs to the front of the Navy Annex and sees the smoke coming from the Pentagon. Alexander immediately sounds the fire alarm and starts getting people out of the Navy Annex. He receives no directions from the Defense Protective Service (DPS)—the law enforcement agency that guards the Pentagon—on what to do, but knows from his training that he has to get people out of the building.
FBI Agents Already at Navy Annex, Assist Evacuation – As the evacuation begins, Alexander notices about 10 FBI agents going down the halls of the Navy Annex. He knows what they are because they have “FBI” written on the backs of their jackets. However, he does not know where they have come from. Interviewed three months later, Alexander will speculate that the FBI agents may have come to the Navy Annex because they received prior notification of a hijacked aircraft heading toward Washington, DC, but he will say their presence at his building “puzzles him to this day.” Because there are no members of the DPS on hand to help evacuate the building, the FBI agents assist in this task. The agents will also give Alexander updates on alerts about potential further attacks. People are moved “farther and farther” from the building following each threat warning, according to Alexander. Later in the day, Navy and Marine Corps senior officers will re-enter the Navy Annex to establish a command center there (see (3:00 p.m.) September 11, 2001). [Historical Office, Office of the Secretary of Defense, 11/5/2001; Naval Historical Center, 12/21/2001]