On Sept. 11, 2001, my wife was teaching middle school (and was pregnant with our first kid, although I'm not sure we knew yet). I had just started my first job out of law school the day before.
She had about a 45 minute commute and probably left our apartment around 6:30 a.m. PDT. I had computer system training the first two days of my job and didn't have to be int he office until 9:00, so I was still at home and turned on the TV after she left. By that time, both WTC buildings had been hit, but neither building had collapsed yet. I'm pretty sure I was still home when the first building collapsed. I probably left for work right around when the second one went down. I was in training with one other new lawyer and the person who was doing the training. The other lawyer was trying to get in touch with some people she knew in NYC (I don't think anyone who was actually in any of the WTC buildings).
Obviously, it was all over the radio as I drove into the office. Speculation about whether someone might be targeting Los Angeles was a big topic.
My drive into the office went right under the very end of most flights' approach into LAX, so I saw no planes going overhead for the first couple weeks of my commute. Once air travel started up again, it was a little eerie for the first few days seeing planes come in so low overhead.
I later found out that one of the partners at my firm was in a building very near the WTC (might have been one of the WTC buildings other than the two towers) for a deposition. The story, as I heard it, was that, after running out of the building, he headed toward the nearby Hudson River and jumped on a boat that took him over to New Jersey. He then rented a car and drove back to Los Angeles. He wanted to make sure to get back because his secretary was getting married the following Saturday.