You can't figure out why they would use thermite and explosives so therefore it didn't happen. Do you realize how vacant that argument is?
Since you know everything why don't you tell us why the hell they would use both explosives and an incindiary never before used to destroy a building.
There were no fires on the lower floors.
Oh, I see. They exploded bombs in the lower floors and then some time later, the buildings collapsed from the top down. Only in CT fantasyland does this make any sense.