I was at my job on Montague street in Brooklyn. It was a client who told me that planes hit the trade center. I thought she was lying. The radios came on in the office and one of my co-workers said he was going up to the Promenade to see what was going on. I followed him outside and saw a black sky. Couldn't still believe it. We walked 1 block to the right, I believe that was either Henry or Remsen street, then turned up on Pineapple st. As soon as the tower came into my sight, it started to collapse. I stood frozen in the middle of street. A car that was behind me also stopped. People gathered on the Promenade were screaming. I went back to my office and gathered my things and left. When I went back outside, someone stuck a handmade sign on the side of a public payphone "Please donate blood. People are dying."
I couldn't help but notice you mentioned Montague St., Brooklyn in your post. I have a corporate apartment there that I'm actually typing this very post from at the moment. I'm here in NYC working on the City's 911 emergency call center project.
Today was a very somber day for the NYPD and FDNY personnel here.