How many of you think that the US government perpetrated the 9/11 attacks?

Frankly, I'm not asking this question to hear anybodies theories or arguments, on either side, I just want to get a good idea on how many people disagree with the current explanation. Do you agree fully that the government had nothing to do with the attacks, or do you think that the government played a part? Also, do you think that there should be an independent investigation into the attacks, or are you satisfied already? Thanks, and watch what you write. I don't want to hear anybody on their soapbox.