You answer me a question or two West didsbury.
How does a passport belonging to one of the hijackers survive a fire that's apparently hot enough to melt steel?
Even if you want to say that on impact, lots of items got blown out of the windows and fell to the ground, did it jump out of his pocket first or unzip his hand luggage ?
I've not checked what name was on it but I hope it didn't say, Muhammed Atta - nationally -Saudi Arabia. That would be too comical for one of the world's most wanted men to carry around his genuine id.
Thinking about it, maybe he had it in his hand because he knew he was about to land and check in.