Fortunately for you, I do believe we landed on the moon. Unfortunate for you, there isn't any one piece of evidence I could show you that shows our Government was complicit in 9/11. There have been books written that have 100's of pages as to why I think this way. I have spent countless hours of my own time researching 9/11, and other aspects of our Government. Only when you put 2+2 together does it equal 4.
However... I can shatter your idea that our Government wouldn't do such a thing with one simple document.
Operation Northwoods
Read through that document, and tell me what you see.