No it doesn't. But fire smoke rises. Fact. Observe how the smoke was rising when the plane hit. According to you the same flames were causing smoke when the towers collapsed. Funny that it decides to fall instead of rise just when it suits your pathetic story. Yeah, when air pressure blows a hole in the wall, it's not unlikely that some concrete will follow---- CHUNKS OF CONCRETE WOULD FOLLOW. NOT PULVERIZED CONCRETE. Yet again your dancing around the subject and avoiding on commenting on the truth or things you cant explain and dont want to take in.