I was at work -- a manager in a hospital that is the regional treatment center for one medical specialty...region includes NYC. Someone came & grabbed me hard by the arm and pulled me into a room, where I saw every single mgr. sitting silently watching tv. Moments later we watched the 2nd tower struck live. The state health dept. informed us to implement our disaster plan and ready for several hundred casualties.
I went back to work as a zombie and began making beds and preparing for several hundred people.....every few hours for the next week or so, the health dept. called and said a bus or helicopter was coming with X number of casualties....except none ever came. They were all dead.
I remember hearing reports of an explosion in the basement prior to the plane hitting, too.