You're right about the steel - because it didn't melt. No one has ever claimed that the steel melted. It did, however, become extremely hot, as you said, 2000 degrees. For a science project, go to a building the size of the WTC, and go to the same location where the planes hit, then bump the temperature up to 2000 degrees, and watch the steel cave in. It doesn't need to melt, at 2000 degrees it has lost all of it's strength and can no longer support the millions upon millions of pounds of building on top of it. I'll agree that the government is ot to be trusted, but if you even fathom that the whole 9/11 attacks were faked, and the towers were bombed, then you are a grade A fucking moron.