Bill, you never answered my last question on this subject. At that time, you were claiming that the then current official "explanation" was that the brackets that held the floors up in the twin towers had softened just enough to allow the floors to slip off of them, and then the floors pancaked down one on top of the other. I pointed out that had that been the case, the core would have been left standing. You never "explained" how the official "explanation" of the day that you had chosen to accept could account for the core not remaining intact.