September 11 attacks
In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence created a joint inquiry into the performance of the U.S. Intelligence Community. Their 832-page report was released in December 2002. In the report, there were detailed failings of the FBI and CIA to use available information. This included information about terrorists the CIA knew were in the United States. They failed to use this information in order to stop the plans. The joint inquiry got its information about Saudi Arabian government officials possibly being involved from non-classified sources. The Bush administration demanded 28 related pages stayed classified.