Ok. We can go back and forth on the plausibility of aluminum demolishing steel but we don't discuss the collapse of building 7 because it didn't get hit by a plane. Its solo collapse, untouched, should render the plane causing collapse theory moot and void. It wasn't the planes causing collapse because this other building next door pulverized into nothing without being touched.

Edit: Basically if one of the three buildings that collapsed that day wasn't hit by a plane, we then cannot consider planes as the culprits.