My wife and I had recently moved from one state to another, and it was my second day at my job here. I was hearing reports on the radio while driving to work that there was a fire in one of the towers, and "unconfirmed" reports that a plane had hit it. I arrived at work and turned the tv in the customer waiting area (always tuned to CNN Headline news) just in time to see the second plane hit live on tv. Living in Wichita, and having 2 airports, plus the Air Force base, we had aircraft coming in from every direction after the order for all aircraft to land ASAP went out. It sort of freaked me out at first when I started seeing contrails coming in from every direction, before hearing that they had told all flights to land.
We only had one customer come into the shop all day, and he was of middle-eastern decent. The store manager looked at him very coldly, and he left. I didn't agree with what the manager had done, but considering he was a Gulf War Vet (Army), as I am (Air Force), I sort of understood.
I was a bit nervous about possibly getting recalled to active duty since some career fields can be recalled for more years than others, and mine was considered a "critical" career field.