Why has there been no criminal investigation into September the 11th?

There never will be an honest, scientific inquiry into 911, as the leaders of our government have blocked any such action. Much of the physical evidence was destroyed or shipped to the far east(all of the steel, as none was ized). And how could a honest scientific study explain how a steel structure could collapse inside its own footprint from debris that would have had to travel through another building to rupture a fuel tank which then would generate heat over 1800 degrees in order to melt steel, then surgically topple WTC7 as neatly as it did. these idiots give bin laden way too much credit and in reality are just insulting our intelligence. Don't forget we got the "Patriot Act" as a bonus. its not lol it's COL