"To a large number of security analysts, this expenditure makes no sense. The vast cost is not worth the infinitesimal benefit. Not only has the actual threat from terror been exaggerated, they say, but the great bulk of the post-9/11 measures to contain it are little more than what Schneier mocks as “security theater”: actions that accomplish nothing but are designed to make the government look like it is on the job. In fact, the continuing expenditure on security may actually have made the United States less safe.
“The only useful airport security measures since 9/11,” he says, “were locking and reinforcing the cockpit doors, so terrorists can’t break in, positive baggage matching”—ensuring that people can’t put luggage on planes, and then not board them —“and teaching the passengers to fight back. The rest is security theater.”
Taking off your shoes is next to useless. “It’s like saying, Last time the terrorists wore red shirts, so now we’re going to ban red shirts,” Schneier says. If the T.S.A. focuses on shoes, terrorists will put their explosives elsewhere. “Focusing on specific threats like shoe bombs or snow-globe bombs simply induces the bad guys to do something else. You end up spending a lot on the screening and you haven’t reduced the total threat.”
Quite likely, they wouldn’t go through the checkpoint at all. The security bottlenecks are regularly bypassed by large numbers of people—airport workers, concession-stand employees, airline personnel, and T.S.A. agents themselves (though in 2008 the T.S.A. launched an employee-screening pilot study at seven airports). “Almost all of those jobs are crappy, low-paid jobs,” Schneier says. “They have high turnover. If you’re a serious plotter, don’t you think you could get one of those jobs?”
What the government should be doing is focusing on the terrorists when they are planning their plots. “That’s how the British caught the liquid bombers,” Schneier says. “They never got anywhere near the plane. That’s what you want—not catching them at the last minute as they try to board the flight.”
To walk through an airport with Bruce Schneier is to see how much change a trillion dollars can wreak. So much inconvenience for so little benefit at such a staggering cost. “We’re spending billions upon billions of dollars doing this—and it is almost entirely pointless. Not only is it not done right, but even if it was done right it would be the wrong thing to do.”
Smoke Screening - Vanity Fair