What really went down in 9/11?

okay im only 14 but i love poitics and i dont think that wat was told to us about 9/11 is tru. why? well fire cant melt steel u need thermite and oddly enough after we were done "fixing"the top floor a few months before we all of a sudden find thermite WEIRD RIGHT? and in the pentagon why didnt we find plane parts and a nice little hole that exeted the other side that was not even close to be fitting an airplane.and why on that day was nobody in that part of the building at that time? all i can say is this country is so messed up!!!!! please tell wat u think.