[Security professional Bruce Schneier on what really makes plane travel safer, and the difference between theater and reality][link]:
>Of course not. Airport security is the last line of defense, and it’s not a very good one. What works is investigation and intelligence: security that works regardless of the terrorist tactic or target. Yes, the target matters too; all this airport security is only effective if the terrorists target airports. If they decide to bomb crowded shopping malls instead, we’ve wasted our money.
[link]: http://www.nytimes.com/roomfordebate/2010/11/22/do-body-scanners-make-us-safer/a-waste-of-money-and-time “A Waste of Money and Time – Room for Debate – NYTimes.com”