there is some debate within the truth movement on if a missile or plane hit the pentagon. There is never one theory on what happened. Thing is, no one knows exactly what happened and thats how you get different theories. How could anyone expect everyone who questions 9/11 to agree upon every detail between them. Thats impossible and will never happen.
And wikipedia isn't the most reliable source. Not saying in this instance what is there is wrong, but when you have joe schmoe behind the computer typing the stuff in there, it creates some concerns.
http://www.theregister.co.uk/2005/10/18 ... y_problem/