My cousin worked on the 97th floor of the South tower. On 9-11, he had to take his daughter to school, if not for that he would have been there. There is no way to be certain, but a lot of his co-workers did not survive.
727, L1011, MD80, A300, 777-200, 737-300, 737-700, 747-400, 757-200, 737-800, A320. E190, E135, 767-200, CRJ9