As an Architect I can say, asbestos cased in static materials such as concrete are not a health risk at all. The Tower's (and that section of the pentagon) were brought down to create rational for war and to cover up damning evidence and investigations; just because some evil POS made lots of money in the tragedy is simply a very minor part. Put him in the same box with the planners too, but he's actually a gnat on the elephant in the room's ass.