There is nothing secret in the area to use as a reason to hide the footage except whatever happened on that day. The Pentagon parking lot is not Area 51. Freeway 395 goes by the Pentagon so close that you could pull over and throw a rock and hit the building. Between the freeway and the building is just this chain link fence. Everyone sees that location as they drive by on their commute every day. They only thing the FBI could be hiding by hiding the footage is whatever happened that day.

There is nothing secret in the area to use as a reason to hide the footage except whatever happened on that day. The Pentagon parking lot not Area 51. Freeway 395 goes by the Pentagon so close that you could pull over and throw a rock and hit the building. Between the freeway and the building is just this chain link fence. Everyone sees that location as they drive by on their commute every day. They only thing the FBI could be hiding by hiding the footage is whatever happened that day.