http://nypost.com/2013/12/15/inside-the-saudi-911-coverup/
It was kept secret and remains so today.
President Bush inexplicably censored 28 full pages of the 800-page report. Text isn’t just blacked-out here and there in this critical-yet-missing middle section. The pages are completely blank, except for dotted lines where an estimated 7,200 words once stood (this story by comparison is about 1,000 words).