I was in third grade. It felt like a typical, beautiful day. Soon, the students were being signed out one by one, and a PA announcement said that there was an "accident at the World Trade Center." I didn't learn of the incident's severity until I was signed out of school and turned on the TV at home. Every single one of them was knocked out except for WCBS-TV. (We didn't have cable at the time, so we had the local antenna channels.) There was footage of the airplanes crashing into the World Trade Center, and the Twin Towers collapsing. I was in shock from the events. In all honesty, I can't recall whether they covered the other two planes that crashed in Pennsylvania and the Pentagon at the time. I remember that CBS 2 kept talking about it 24-7 for the next two weeks, and many businesses in NYC stayed closed for a few days.
I'm grateful that this event hasn't affected me directly, but it could have. My dad worked very close to the Twin Towers at the time, and was offered a job in one of them.