BBM. I agree with both of you. I have wondered if either he was part of the "plot" or if he was even a "victim" of 9/11. Could he have been someone who was supposed to be at work that day, played hookie, was not killed, and the guilt drove him to suicide. It could have had him snap, instead of letting his family know he was still alive. He could have been considered missing and dead already. He just walked away, unable to cope.
I know there is the belt issue, with the weight loss...but my concern has always been that any second hand store/homeless shelter/etc is going to have pre-used belts. I often think we fixate on that detail too much. I can pick up a set of clothes and a belt from Goodwill today and if someone found me in them, it could be totally misleading...IMOO.