I think about 9/11 more often than I like. I was on my way to work when it happened. I had been married all of two weeks at the time. I heard about the two WTC hits on the way in and learned about the Pentagon after getting to my office. There were also rumors of other govt sites getting hit by car bombs and such. We're a govt project, but outside of DC. One of my coworkers, who's husband worked at the Pentagon, left in tears proclaiming her kids weren't going to become orphans. We were scrambling to do last minute emergency backups which the IT Security guy was going to take offsite in case our location was hit. We had many sites in the two towers and saw the IT related effects of the towers being destroyed (sites going dark, etc). I managed to get through to my wife before the phone system was overwhelmed to let her know I was ok and heading home after we completed our last minute preparations. By the time I got home, the phones were swamped and we couldn't call out again for 6-7 hours. That entire time, my family, who only knew that I did govt IT consulting, was wondering if I was at an affected site (wasn't into radio at the time or I might have gotten a message through one of the traffic nets, nor did any of us have txt capable cellphones).
Looks pretty changed to me.
We know the obvious changes, but how about a couple subtle ones:
Companies and govt take COOP/DR seriously now.
Many civilians actually have disaster plans in place.
Chris