I agree with most of them, but the first and the last.
As far as the first one goes, you get the same effect with the BASS interview system that has been discussed before, and you don't flag the nervous travellers.
The facial regonition system only works if you know what to look for. Providing we are looking for terrorists (and not the common criminal) I claim that we do not know the faces of most of them and thus this would be another unncessary expense.
Originally Posted by eyecue
A voice stress analyzer at the ticket counter.
A bag xray device
a back scatter passenger x ray
a walk though explosive detector
a hand held explosive detector
a k-9 trained for explosive detection
Facial recognition software camera's
Thats about it santa!