Hypothetical situation here, imagine you see a truck on the freeway and on the back of this truck is one of those vending machines ( junk"food", soda... whatever ) and the machine falls off the back of the truck and then the large heavy truck that was following the first one, runs over said vending machine. now what do you see in the road, a badly damaged vending machine. OK, now in a artist workshop, an artist sets about to dismember a similar machine, and using cutting torch, saws, grinders, the machine is reduced to small bits, now if you compare the two end products of these specific events, you would say that there is an obvious difference between the two events in the outcome of each. so now, to point to the skyscrapers destroyed on 9/11/2001, why should you expect to see the result that is indicative of a intentional event, that is one having been guided by intelligence rather than the product of chaotic forces. Why should complete destruction be considered "normal" in the case of an event that is allegedly the product of chaotic forces.