United States and European authorities, looking for more tools to detect terrorist plots, want to expand the screening of international airline passengers by digging deep into a vast repository of airline itineraries, personal information and payment data. A proposal by Homeland Security Secretary Michael Chertoff would allow the United States government not only to look for known terrorists on watch lists, but also to search broadly through the passenger itinerary data to identify people who may be linked to terrorists, he said in a recent interview. Full Story