I was on my way to work when the first plane hit the WTC. I was totally oblivious... listening to a tape instead of the radio. I got to work, walked in the door, and heard a commotion in the break room... went to the break room, and there were most of my coworkers, watching as the second plane hit.
I was freaking out because my parents had told me of their plans to "spend Tuesday in the city" so I thought they were in Manhattan... turns out they had been talking about the following Tuesday, the 18th, and were in fact safe at home on Long Island. I tried to call them, but of course the phone lines were down, so I emailed them "PLEASE email me IMMEDIATELY and tell me you are safe!!!" About an hour later, I got their reply.
My office was closed around 2pm. I don't know how I drove home, I was crying so hard. I just kept thinking how easily it could have been me, either on one of the planes or in the WTC; I live within commuting distance of NYC (though it's a stretch) and I used to fly on a weekly basis out of Logan Airport. Self-centered, I know, but I wasn't exactly thinking straight
God Bless America. I will never forget.