Why the Bush Administration ignored 52 warnings of attack from April to September 10, 2001

Yes, 52. According to the New York Times, February 10, 2005, "...leaders of the F.A.A. received 52 intelligence reports from their security branch that mentioned Mr. bin Laden or Al Qaeda from April to Sept. 10, 2001. That represented half of all the intelligence summaries in that time."

Why did they just sit on it?

Why did Bush just sit there in that classroom when he was told the attacks were in progress?

It's called the Project for the New American Century (PNAC). A quick summary of it is available here. PNAC is chaired by the editor of a newspaper owned by the CEO of FOX News, Rupert Murdoch. According to PNAC, America must dominate the world, and in order for events to begin that will enable this, a "... catastrophic and catalysing event - like a new Pearl Harbor..." (from page 51 of the PNAC report entitled "REBUILDING AMERICA’S DEFENSES") was needed.

Tell three people tomorrow.