Well, I fully believe the 9/11 Commission Report myself on the major points. Conspiracy whackos try to wither away at the edges of the Report by pointing out what ISN'T in the report as some sort of proof that the Report is wrong--by omission. I'm less concerned with the explanations they offer than I am concerned about why mental health officials have not diagnosed this schism more robustly.
If you're asking for alternative theories; you've got to find one that fits the known facts; 19 men hijacked 4 planes and crashed them into 3 structures and a field in Pennsylvania. I haven't seen any that fit but I will offer one that does.
Disclaimer:
Forget US government involvement. There was none. Otherwise the body count would have been much lower. The idea that buildings were taken down to kill a few people or hinder an investigation is batshit crazy on it's surface. So there is no conspiracy inside the government. It would have been much easier to simply steal the files of the investigation or kill the targeted people without the collateral damage and increasing difficulty of hijacking planes.
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The undisputed "winner" of the war on terror is big oil. Record profits have been posted by many (if not most) oil companies and the records they break were ones set during the post 9/11 era. So if you want a smoking gun; point to oil.
Do I think the CEO of Chevron did it? No. But mid-sized players who operate refineries shouldn't be overlooked.
Well, In my scenario, the CEO may have experience in the Middle East as perhaps one who negotiated agreements before, one who traveled extensively, or perhaps one who has dealt with the Saudis in the past. Somewhere he either met or met someone who can get in touch with Bin Laden.
Well, through this contact he funds Bin Laden's network Al Queda and tells him that he wants them to do something to cause instability in the Middle East since that equals higher gasoline prices at the pump. So payments are made in the mid 1990's. Likely 5-8 large payments that show up as R&D on the company's books stateside. During that time nothing happens outside of a few attacks in Nairobi and Tanzania. Kobar towers. The USS Cole. So the relationship continues. More payments are made.
Then 9/11 happens.
Likely our oil man is shocked that it happened stateside. But what is he going to do? Tell on himself?
See, Bin Laden found out that he can goose the US into action by doing this. From the book,
The Lexus and the Olive Tree:
One has to remember, we didn't use to do that--fire missiles at people. During the relationship with the oilman, Bin Laden's motives changed from being a two-bit thug to wanting Islam to become a superpower.
So out of this relationship; the oilman got the price of his commodity to increase and Osama got his war in the Middle East and got Islam riled up. The conspiracy is between 2 or 3 men. Two of which are dead (more than likely)--Osama and his intermediary. More on the third later on.
Enrico Fermi is credited with making the first sustainable chain reaction. Osama may be our generation's Fermi. In some village somewhere over there, our demise is being plotted. Blowback is coming. Watch. But it will ultimately fail because Islam is self-defeating as a geopolitical force; you can't go anywhere without the women.
Who was the 3rd man? Well, I don't mean to personify him but if I had to guess; it would be someone like Oscar Wyatt. Maybe not him per-say but he fits the profile.
Then there's this:
Legendary Texas oilman Wyatt indicted in scam - Houston Chronicle
Oscar bought Saddam's oil during the embargo.
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Again, I fully believe the 9/11 Commission Report. None of the above happened. BUT...if you want to play the parlor game of HOW something like this could happen; you need to build the ship in the bottle that the Commission Report created.