The real story from this isn’t just that different parts of the government were doing drills very similar to what actually happened on 9/11, but that the National Reconnaissance Office sent its employees home when the real world events of 9/11 began to occur.
Think about this more carefully. The National Reconnaissance Office operates surveillance satellites which could have been used to monitor the Pentagon. In what way did the drills of the National Reconnaissance Office curtail surveillance of the Pentagon? Was the National Reconnaissance Office evacuated anterior to the Pentagon being hit?
If so, doesn’t it seem awkward that the Pentagon wasn’t evacuated despite the FAA notifying NEADS of incoming aircraft 15 minutes before impact, but the National Reconnaissance Office, which is the one agency that could have seen what actually hit the Pentagon, was evacuated before the Pentagon was hit?