A smart system would have been something such as checking non-citizen's passports before flying. However, since some states don't want to identify a non-citizen on their driver's license, it is difficult. If they did, the 9-11 people would have been required to produce their passports and then the a/l personel would have seen that their visas were expired and the police could have involved.

A smart system would recognize that all flyers are not threats just because they haven't passed through the TSA security system. A smart system would fix errors of people on the 'no fly list' quickly. A smart system would profile those who should be screened more carefully. Look at Europe and see who they have pulled off on the side checking them closely. A smart sysyem doesn't use a 'one test fixes everything' system.