Come on Steven Jones, you know better than to say that airplanes can fly through steel buildings as fast as they fly through air. "Buildings swaying" isn't proof of anything except that buildings sway. I doubt, sincerely, that an airplane crashing into a several million ton steel and concrete building will cause much swaying at all. As a physicist you should be able to calculate what the impact could or could not do. To have you citing as evidence, fake videos and anecdotes, is appalling to say the least.