9/11 Deniers: Do They Have Credibility?

One of the emerging debates in American politics today is between the mainstream historians and fringe revisionists who claim that 9/11 did not in fact occur, and that the event was simply inserted into history without anybody fully checking the veracity of the claims regarding an Al Qaeda derived attack on key US economic, political and military targets.

Did it really happen? Is there some credibility to either side of the argument?

Let's hear your views.

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I don't have information about US troop deployments now, but during the Cold War, the US garrison in Germany was the entire US 7th Army--two reinforced mechanized corps, plus 10+ fighter-bomber wings, + nuclear weapons.  A bit to the north of the 7th Army's occupation zone was the British Army of the Rhine, a single smallish armored corps, plus significant air assets, plus nuclear weapons.  That information was current as of, say, 1985.  And the Soviets had two reinforced army groups in East Germany, 4-5 times that number.

What are the numbers in 2009?  I dno, lol.  The Russians have been gone for years and years.  I don't know how many US or UK troops remain in Germany now.