The forensic work has already been done. The calibration tests gave the fires a very short window of failure opportunity. We don't need any more tests to demonstrate that the official explanation is corroborated only by itself--like the turtle who holds up the world:
Q: What's under the turtle who holds the world up?
A: Another turtle.
Q: What's under that?
A: It's turtles all the way down.
It's a ridiculous theory with no real-world underpinning, no forensic corroboration, and for which their own lab tests disconfirm it.
1100C gas temperatures for 10-20 minutes in any given location simply is not enough energy to cause the things we saw. In order for the NIST theory of collapse to be true, we must presuppose a thermodynamic miracle. There just isn't enough energy for paper, plastic, wood, carpet, kerosine, and all the other hydrocarbon sources combined to do the kinds of damage necessary.
Why not just say the buildings had the "cold explosion flu". The first two got it from the planes, then they spread it to building 7. That's at least a coherent theory. All the high temperature stuff, you could just say "side effects of CBF." Still coherent. At least.
There is an energy gap. That's the real problem with the NIST explanation when you get done poking holes in it like a straw through wet tissue paper: it doesn't address the expressions of energy. The tonnes of pulverized concrete, molten metal, the molten concrete that coated weapons in a basement armory, vaporized lead, the silicate microspheres as well as the iron ones, the NASA data indicating surface temperatures of thousands of degrees C lasting weeks, the "meteorite" artifact, the WPI steel, oh, you know. All those little things NIST investigators considered insignificant to the investigation of one of the most significant events in American history.
This isn't rocket surgery. The data is there.