I was a young beginner software engineer, and was out of town when it happened, at a bootcamp for MCSE studying. We had nothing to do but keep going with our studies - we couldn’t fly home since air traffic was all halted - so we just put our heads down and tried to focus on the task at hand.
I have never in my entire life been so glad to be home as I was at the end of that week, though. Homesickness for Eugene was roughly 1000% higher than at any time before or since.
High school. I remember watching the news while eating breakfast and feeling the shift from “wow it’s crazy that a plane hit a building” to “oh shit” as more reports came in.
I lived in rural Nebraska at the time and it all felt very far away. None of my teachers interrupted class with it as I recall (I know quite a few people had that experience).