I can't swallow the whole missing plane theory but I think it overshadows the really sinister prior knowledge that is verifiable and maybe even government corroboration with the terrorists. The danger lies in swallowing the whole Conspiracy theory as a whole. If you can disprove even one part of the imaginative cospiracy theorist then the real prior knowledge of the new world order is undermined. What if the airplane was deliberatly crashed into the pentagon by our own secret government types? And this missiing or wrong airplane theory is just a diversion. Seeing is believing: Looking at the actual piece of airplane that was ripped apart. That tipped the scale for me. I find it hard to believe they too a part of a 757 and placed it at the scene.