I am old enuf to recall the Challenger incident (art school) and obviously 9-11.
I had the opportunity last year to visit the site of the crash in PA. Very moving. From what I understand they are having problems there right now due to financial issues of the farmer who owns the land. Security costs and all that happy horse crap. Anyway I thot y'all would like to see a few pics I took. I have more but I dont know where they are and I would have to scan them (remind me at a more awake type hour)
This is just ONE of the many plaques that are there.

This is one side of a very large bulletin board type wall/fence that is hung with momentos from all over the world. People have left caps and shirts and lots and lots of patches, mostly from rescue personal.

There are also metal guard rails that surround the parking area that everyone has signed with their thots. The visitor area is quite a distance from the center of the crash site but a flag is out there commemorating the spot.