Assistant Chief James Schwartz and FBI Special Agent Christopher Combs set up the Incident Command Post at the Pentagon. Combs served on the FBI's National Capital Response Squad, an antiterrorism rapid response unit. As the regular FBI liaison to the fire services, Combs routinely cross-trained with regional departments; earlier that morning he had been at the D.C. Fire Academy training firefighters in counterterrorism tactics.1

 

Chief Schwartz arrives on the scene

 
1 Goldberg, A. Papadopoulous, S., et al "Pentagon 9/11" Historical Office, Office of the Secretary of Defense n.d PDF. March 16, 2011 page 73 http://osdhistory.defense.gov/docs/Pentagon%209-11.pdf