A very large amount of explosives would have to be used to collapse the building. This is indisputable among the sane and the intelligent species. The reason I dismiss a small amount of explosives to initiate collapse of an already compromised structure integrity is that because the collapse initiated at the very point of aircraft impact. How did these explosives survive aircraft impact, explosion, subsequent fires and displacement?
Mince, you keep saying that. I understand you doubt the plausibility of explosives being used. I did too for a very long time. However, i am asking for you to give an explanation for what you did see. My explanation is explosives. What is your explanation?
As soon as you realize that there is no good explanation, the easier it is to rationalize the use of explosives.
As to how they withstood fire? They didn't. There were no fires below the fires! They could have the technology to precisely control the altitude of the plane with remote control technology. It could have been sent to hit directly above where the demolitions were planted, or to be safe, maybe they did have explosions directly where the plane hit, and those DID exploded during the plane collision.
(as for the molten steel or iron dripping from the towers, of which thermate is suspect, it takes extreme temperatures to ignite thermate that are not even close to being reached by the fire that was burning, a special igniter is needed to create these temperatures to initiate the thermate reaction) But let's not discuss thermate here, we'll save that for another day.

