Unfortunately there are a lot of things that went away after 9/11 with aviation. There are others that went away having nothing to do with 9/11 (local sightseeing rides). I’ll bet these “things” that have gone away is a big reason less and less young people are wanting to get into aviation. How many persons actually are able to just go to the airport to watch planes takeoff and land. I know my home airport did away with the observation decks years ago in the name of security. To be honest with all of the cockpit barriers now in place and this new requirement coming, I’m surprised the pilot uniform hasn’t disappeared as well, after all how many times do passengers actually see the cockpit crew anymore during or after the flight.