However, I sincerely doubt the effectiveness of this system. First of all, making such a system operational, actually carrying it out the way some people want it to, right now, looks quite impossible. What's more, even if operational, it wouldn't give the results that were planned.
I don't know about that. First, country of origin should be established as the first way to begin the process (which by default means we need to find better ways at preventing the falsification of travel documents). Passengers from rogue nations should be flagged right from the beginning for airport security. This doesn't excuse domestic passengers, but this would be a start in weeding out the type of hijackers that have succeeded thus far.
