Ever so often, one of the cable channels, science, history, etc., airs a program debuning these fables. I think it runs about two hours. Think the title is 911 Conspiracy Theories or something like that. They state the theory and then demonstrate why there’s no truth in them.
One theory is that the towers were brought down by controlled demolition. They take a building and show all the steps necessary to prepare it for demolition which pretty much demonstrates that everyone in the towers would have know for weeks it was being wired for demolition.
They even have some of the major conspiracy mongers on the program and ask them their opinion of the tests they’ve conducted, etc. Quite amusing watching them squirm.
When confronted with the demonstration of the demolition requirements, one of them stated that the demonstration didn’t take into account all the super secret explosives that the pentagon would have used. He was unable to name these explosives but was certain that they really really did exist.
''''Elevator Contractors''' were in there a long time just before massive controlled thermite reaction took place.
Ask any Elevator contractor you happen to know, they're never in any one place that long.