On post-underwear-bomber airport security, as ever Bruce Schneier sets the fluff aside and gets to the point:
It’s magical thinking: If we defend against what the terrorists did last time, we’ll somehow defend against what they do one time. Of course this doesn’t work. We take away guns and bombs, so the terrorists use box cutters. We take away box cutters and corkscrews, and the terrorists hide explosives in their shoes. We screen shoes, they use liquids. We limit liquids, they sew PETN into their underwear. We implement full-body scanners, and they’re going to do something else. This is a stupid game; we should stop playing it.