Worthless Airport Security

Schneier on Security: Airport Passenger Screening:

"It seems like every time someone tests airport security, airport security fails. In tests between November 2001 and February 2002, screeners missed 70 percent of knives, 30 percent of guns and 60 percent of (fake) bombs. And recently testers were able to smuggle bomb-making parts through airport security in 21 of 21 attempts. It makes you wonder why we're all putting our laptops in a separate bin and taking off our shoes.

...And, as has been pointed out again and again in essays on the ludicrousness of post-9/11 airport security, improvised weapons are a huge problem. A rock, a battery for a laptop, a belt, the extension handle off a wheeled suitcase, fishing line, the bare hands of someone who knows karate ... the list goes on and on.

...The terrorists' goals have nothing to do with airplanes; their goals are to cause terror. Blowing up an airplane is just a particular attack designed to achieve that goal. Airplanes deserve some additional security because they have catastrophic failure properties: If there's even a small explosion, everyone on the plane dies. But there's a diminishing return on investments in airplane security. If the terrorists switch targets from airplanes to shopping malls, we haven't really solved the problem.

What that means is that a basic cursory screening is good enough. If I were investing in security, I would fund significant research into computer-assisted screening equipment for both checked and carry-on bags, but wouldn't spend a lot of money on invasive screening procedures and secondary screening. I would much rather have well-trained security personnel wandering around the airport, both in and out of uniform, looking for suspicious actions.

When I travel in Europe, I never have to take my laptop out of its case or my shoes off my feet. Those governments have had far more experience with terrorism than the U.S. government, and they know when passenger screening has reached the point of diminishing returns. (They also implemented checked-baggage security measures decades before the United States did -- again recognizing the real threat.)"