Here's an interesting post from another thread:
Hi Wizard:
I was actually working at 7WTC on 9/11 and for three years previously.
I would love to tell you about the debris that started hitting out building almost right away after the first plane hit the towers.
In fact after I got down to the lobby from the 43rd floor, there was so much debris in the front of the building that we were forced to go through the back of the building and away from the area.
Throughout the 45 minutes it took to get down to the lobby, I heard numerous loud noises and heard reports of debris hitting the building and frankly it scared the **** out of me.
You might as well also disregard the fact there were people on most floors 7 days a week and with 24/7 on a few of the trading floors. We were packed in like sardines even before the merger and it got worse after. I personally worked on an average 85 hours a week.
I would love to find out how my building was wired for explosives while I worked there and I didn't see one significant construction project going on anywhere from the floors I frequented 28-45th.
In other words, try talking with people who actually worked in the building and lived through the experience instead of watching Google Video.