I think it's completely and totally false. And for the gullible, and conspiracy theorists.

Studies have been done as to why the towers came down as and when they did, and it had to do with how the structure was built, the force of the initial impact AND the temperature at which jet fuel burns, and the quantity of jet fuel present.

And if this had been done by someone to provoke war, don't you think they would have staged it to be obviously linked to Sadaam Hussein, instead of Al Queda, which are not at all the same entity?