If you want the truth about 9/11 then just call NORAD (here's their phone number 1 (719) 474-1110) and ask them who would have to give the order for them to stand down.
As it turns out, it's a very short list, and every person on that list is in the United States government.
(NORAD's mission is to "prevent air attacks against North America". If they had not stood down on 9/11 then the attacks never would have happened.)
RE: 9/11 - Results From An Informal Steemit Survey -Does Steemit Believe The US Government Was Involved?