Okay so I'd like to ask why the hell anyone wants to make 9/11 jokes. By the way, as an engineer I'm going to clarify something for all of the idiots. Jet fuel burns at 800-1500 degrees while the melting point of steel is a little over 2200 degrees. So, no they can't but I don't remember anyone claiming this. However, heating metal causes it to slowly become more malleable (you know because that's something you learn when you're 10). The heat from the fire, combined with the physical trauma weakened the support structure of buildings causing them to collapse. I don't know why it suddenly became okay to walk around making fun of dead soldiers, tragedies, murder, -blam!-, and all the horrible bs that this world has but trust me, if any of it touches your life it won't be funny.