I don't believe most of that stuff. Just seems to odd to me. If the USA government knew about it, there would need to be a motive to let such an attack happen. I don't see any reason as to why the USA would want such a thing to happen. Corrupt as government officials may be, I doubt that they are evil.

And as for the second link, my dad saw the plane fly into the second tower on TV, live, on a commercial television station. Unless the newscasters were in on this cahoots as well, I don't see how this would be possible.