Where were you?
I was teaching 8th grade language arts in Colorado. I distinctly remember that it was school picture day. The staff had gathered around the sign in front of the building, and many teachers were saying something about a plane hitting one of the WTC towers. At the time we had no idea of the true impact.
Classroom TVs were on for much of the day--hard to know how to address grammar when people's lives are literally crumbling. I was also teaching in a high-military area--many of my students' parents had been serving overseas, and it defintely hit a nerve for them.
My thoughts today are with those whose lives were directly affected.