Was 9/11 an Inside Job?

I'm not a conspiracy theorist and dislike conspiracies but every year on this day the talk about 9/11 being an inside job heats up again. I've read some articles about the different conspiracy thories surrounding 9/11 and they didn't make much sense. What's your take on this?
Yes it was (How? Explain)
Vote A
No, don't be an idiot. It wasn't (How? Explain)
Vote B
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Was 9/11 an Inside Job?
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