How Does the Saudi Relationship With the Bush Family Affect U.S. Foreign Policy?

Did family ties blind Bush to the terrorist threat from Wahhabi Islamists? By Rachel Bronson and Craig Unger: "The Saudi flights were screened by law enforcement officials, primarily the FBI, to ensure that people on these flights did not pose a threat to national security, and that nobody of interest to the FBI with regard to the 9/11 investigation was allowed to leave the country."