Truly the unsung heroes of that day. Had anyone said the night before that the FAA was going to call a full unplanned, unrehearsed, unannounced, untrained for ground stop of every aircraft over the United States and Canada in a matter of a few hours while dealing with an airborne attack on the United States, no one would believe it would be possible let alone doing it with out losing a single aircraft.
Well said. They did an unbelievable job that day. Many devoted professionals prevented many, many deaths that day.