ATS really has been through this a million and one times.
I would say have a look in the 9/11 section and read through some of the threads already created. Its amazing some of the information you will find
there. ATS has been beating this horse for years now, so its next to endless what you can find there.
[Edit: to add]
Please make use of the search feature prior to posting. It will help to prevent future
incidence of duplicate threads on the same topic/subject.