Even the Clinton/Gore expirement "got it" in 1996. Well, that was until the airline industry and other "concerned" groups supplied the DNC and the Clinton/Gore campaign with funds for the '96 election. In keeping with the "requests" of these "supporters", the '97 Gore's security recommendations were watered down to the point of being irrelevant, allowing Atta and co. to board the flights on 9/11. The upside to all of this - Bush and co. have brought the fight to the enemy and radical islamists are being killed on a daily basis.
The recommendations combine computerized profiling of all airline passengers and high-technology detection devices -- measures designed to address the changing and increasing threat of terrorism.
http://nsi.org/library/safety/aviationsec.html