To #52: When I pointed out the 1% success rate I should have specified that I was pointing to a a rate NO HIGHER than 1%. It might well be lower, as you note. However even 1% is so utterly pathetic that I didn't see any point in making that explicit.

Cory writes: "look, if it's peer-reviewed science, that means terrorists can just look it up in the damned journals, and if it's not science, why should we believe it works?"

The answer is we shouldn't believe it works, at all. According to the linked article the TSA has gotten no more than 700 arrests out of 70,000 "referrals" under this program. That gives them a false positive rate of 99%. Or to put it another way, they're right only 1% of the time.