How many people think that 9/11 was an inside job?

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I don't want to believe that our government could do something to our people like 9/11. But I'm worried that it might be true. At first I said no way! But there were always some questions lingering around and I would just not think about it. But after time I looked at some of the so called evidence proving that it was an inside job, and it scares me. As time goes by I see in polls and stuff, how more and more Americans are believing it was an inside job. This is very scary if you think of it. Americans killing Americans. Sounds crazy but I don't know, what do you think?