While the 9/11 attacks were occurring, I was flying from Kansas City to Dallas. There was nothing unusual on our flight. I did notice that the seat belt signs were on the entire time, even though the flight was smooth. The flight attendants finished the beverage service early, and then sat down too.
Dallas-Ft. Worth is normally a very busy airport in the morning. However, that morning there were no planes moving around when we landed. I remember looking out the window thinking there must be bad weather somewhere, because there was so little activity.
The terminal was surprisingly empty. I finally noticed that the restaurants were packed with people watching TV. And I walked in and asked a woman what was going on.