Ever since I read Gore Vidal’s Dreaming War: Blood for Oil and the Bush-Cheney Junta I have believed the White House had some sort of prior knowledge of the attacks of 9/11. In an interview shortly after the book was published and before the US invaded Iraq, Vidal gives the main reason for doing so:
The true motivations are that the government is in the hands of oil and gas people. The two Bushes, Cheney, Rumsfeld, Rice and so on. The oil reserves of the world are dwindling, and the greatest reserves or all are around the Caspian Sea…Simple enough—Vidal describes in the book several strange inconsistencies surrounding 9/11, including the unknown whereabouts of Defense Secretary Rumsfeld, the unusual delay getting the fighter planes scrambled, the intelligence gaffs. Much more has been discovered since he wrote the book.
There are those among the sane who think conspiracy mongers are of a psychopathic type that precludes rational thinking or discussion. There are those among the conspiracy mongers who think non-believers have their heads in the sand. No matter what you think, there are a lot of unanswered questions that make the Bush leadership prior knowledge of, and complicity in, the tragedy of 9/11 plausible. One place to start checking it out is here.