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*I have heard of perhaps 5 people who doubted the government's version from the start. However, their skepticism did not come from some pre-existing, rigid or dogmatic worldview. Rather, they had been given tips by intelligence officials or others about the impending attacks, and knew they should have been prevented, or they were physics professors who knew that the destruction of the Twin Towers defied the law of physics which would apply to normal "collapses".