I can't imagine what it must be like in the U.S. From the reports, I'm dreading flying there.
However in Europe things have been relatively normal in the skies. I flew from WAW to LHR on LOT about 7 hours after the attack. Our flight was full and no one seemed to have any problem. We even had metal knives with dinner at that point as we didn't yet know about the terrorists use of box cutters.
Saturday I flew from LHR to NCE on BA and the 767 was full. Check in was relatively normal and took about 15 minutes total. This time, we had plastic knives with the meal. But people acted quite normal, drinking and chattering away as they headed down to NCE for some fun in the sun.
I guess it's that Europeans have lived with terrorism on their soil for...well forever really. They know how to carry on. I hope Americans can carry on after this tragedy.