Security expert Bruce Schneier has made several interesting and insightful posts on his blog over the last few weeks about airport security and security theater.  These are a few you should check out:

• Christmas Bomber: Where Airport Security Worked


• Post-Underwear-Bomber Airport Security


• Matt Blaze on the New “Unpredictable” TSA Screening Measures

I also highly recommend that you follow his blog.  He’s a respected security guru, he knows what he’s talking about, and it’s usually very interesting to read his stuff.