An excellent question. First, I can't even imagine the repercussions amongst the general American public if this is ever proven like you say, the family of survivors would be screaming for justice, and there are thousands of them. There would be some sort of witch hunt to place blame, somebody like Cheney would go to jail, but the bigger change could immediately take place, a 180 degree on American foreign policy. Which has been shaped for the worse by 9/11, this video by former General Wesley Clark is very telling, this part is not a conspiracy, but factual as he states. The war on terror would be instantly over, and maybe just maybe as America turned inward to heal itself it from this further tragedy it could advocate peace instead of war.