Actually, it is well within the time of free fall. The towers were 1368 feet tall. A rock dropped from 1368 feet would hit ground in a little over 9 seconds.
Problem is the Towers DID NOT FALL IN 9 SECONDS! GOT IT?
At the risk of being REDUNDANT... I will give you access to the same information I provided “BocoLoco” ... for YOUR education in facts to begin:
http://www.youtube.com/watch?v=qLShZOvxVe4&feature=player_embedded#!
DEBUNKING 9-11 MYTHS:
http://www.debunking911.com/freefall.htm