There are important unanswered questions about the passenger lists for the four airplanes involved in the September 11 attacks. These questions all tie in to the alarming alacrity with which U. S. authorities identified the hijackers. The passenger lists make it clear that the identification was based on information not released to the public. Just what kind of information does the U. S. government have so readily available that it can identify both the number and names of the hijackers so easily?