Aus 9/11 Wiki
Excerpts from an interview with Captain Michael J. Neri, Jr., who was Special Assistant to the Assistant Surgeon General for Force Protection.
"Colonel Fruendt, our secretary Doreen, and myself were in there. I looked at Colonel Fruendt and said, I'm surprised we haven't heard an announcement about increased levels of THREATCON here at the Pentagon.
Did not see aircraft. Was inside the building.
Source List: Response