A quote from Maddox, from The Best Page In The Universe:
there are countless hours pissed away by conspiracy theorists who think the WTC towers were demolished by bombs planted by the government. These armchair engineers write endlessly about how the physics of the collapse was impossible, how the temperature wasn't hot enough to melt steel, and how the planes were carrying missiles. Of course, the one thing they don't postulate is a REASON.
My personal favorite warblog was one that had a flash animation with people who were quoted as saying "it didn't sound like a plane to me... it sounded like a missile." Thank you Joe Nobody for giving me your expert opinion on what missile sounds like, because gas station superintendents are usually the best people to ask about the sonic signature of ballistic missile thrust.