Crah Dive, I'm all for the most stringent measures to prevent any future catastrophe. Where are all the anti-finger printing/DNA testing/national ID card liberals now??!! Computer screening is an excellent idea, but only if correct identities are fed into the system. False IDs are one problem, & I won't go into details about other anomalies in public. Combine computer screening with aggressive pre-flight "personal" screening such as done by El Al, and I think that a very effective system could be put into effect.