I was living in NYC at the time. I got off the subway and went into the elevator to go to my office, and heard about the first plane on the way up. We were thinking it was some idiot who lost control of the plane. By the time I got to my floor (54th floor), the second plane had hit while my coworkers watched. My boss was waiting at the elevator to meet all of us and tell us as we got off. We watched the towers from our windows.
My cousin works at Lehman Brothers (attached to the Twin Towers), so I called my aunt to ask and make sure she wasn't working that day. Thankfully, she was there and fine.
After a few minutes, we decided to leave the building because we thought it might be another target. I worked at CitiGroup at the time, in a skyscraper that has CitiGroup and the logo on all sides of the building; if terrorists wanted to hit a multinational corporation for symbolism, we figured we'd be a nice target.
Anyway, got downstairs and called my mother on my cell. She was in CA, so of course I woke her, but I needed to tell her I was fine before she heard the news. Good thing I did, because I then lent the phone to my coworker to call her kids' school, and she couldn't get through. My call was the last time we were able to use cells all day. The entire network was overloaded, and we were standing in line for pay phones before it all ended.
My coworkers and I ended up walking for hours, trying to figure ways to get home. We walked out of the building before 9:30, and I wasn't on my way home until close to 5. And I was lucky.
Yeah, we have to move on, but some memories are starker than others. By the time I saw the images on TV, it looked like something else altogether. My memories of that day have nothing to do with the TV images, and everything to do with the terror and the people who were with me.