Two major things show the inside job:
How do you prove an "inside job" was even done by Americans? Many people walk around who are not Americans such as the Saudis that have been seen around.
1. Not enough heat, as shown by photos of people walking around in the damaged areas, right where the heat was supposed to be greatest;
People can walk around near an airplane crash area. There are many different events with airplane crashes, that have people walking around. I'm not convinced
2. Building collapse into its own footprint, at free fall speeds, as only could have been done by demolition.
Saudis could have made it that way