I'm seeing this question all over ---where was I on 9/11? I remember that day very clearly. It was a terrible day. At my school, there used to be a room with a television (TV gone now). On September 11, people like me (not a classroom teacher), popped in and watched the air strikes, the commentary, and the twin towers fall---again and again. We didn't tell the kids--the classroom teachers carried on.
It was a truly awful day and time.