Ignore the "truther" lunatics and read this book instead, which is based in reality. It chronicles the intelligence failures that lead up to 9/11, specifically the CIA's failure to share intelligence with other agencies due to bureaucratic infighting, oversized egos, and an attempt to "flip" members of Al Qaeda, despite knowing that several of the hijackers were living here for more than a year prior to 9/11 and plotting an attack using airplanes.