well then you must have proof about how hot that metal got so let's have it?
Now if you read the 9-11 report they will tell you that the fires did not cause the collapse of any of the towers. They specifically state that up front as anyone with a smidgeon of knowledge about office fires will tell you that they do not generate enough heat to cause steel to buckle. So please in your infinite knowledge please tell us how the fires brought down those or any steel building in the last 50 years?
Now what the 9-11 commission report wants everyone to believe is that the two towers were brought down by the planes breaking through ten core columns. Their initial models looking at how the planes went into the towers only showed that three at most cores could be broken but their models didn't work until they got to the number 10. How's that for scientific inquiry? Oh and they specifically did not look for any other method including explosions.
They also have never given a reason for tower 7 to fall.