@iMon: Actually there is AN ABSOLUTE TON of proof and evidence on Debunking 9/11 website. Read it. It's all backed mathematically, scientifically, and logically. Loads of interviews with those who work in government and construction. I remember seeing an interview before where one of the builders said it was built to hold against small plane crashes, but nobody could have predicted a full-scale Boeing would hit head on. And it did resist, but it is a fact that if you expose steel to flame and heat, eventually it will bend. Everything has it's breaking point. The towers may have been built to sustain damage, but they still fell within the hour. Also, WTC7 didn't need plane damage when it was being constantly hit with huge amounts of piling debris from the towers not to mention the fires going on inside. I'd rather believe science and logic than those that quote out of context. But then, it's pointless to argue with a conspiracy theorist, because truth just fuels their lies.
@rubenjrc: Your sentence doesn't make sense, but yes. There were planes. That debate was one of the things that caused this conversation to get out of hand the last time.