Do you feel safer?

"Security theater" refers to security measures that make people feel more secure without doing anything to actually improve their security. An example: the photo ID checks that have sprung up in office buildings. No one has ever explained why verifying that someone has a photo ID provides any actual security, but it looks like security to have a uniformed guard-for-hire looking at ID cards.

But there are literally millions of potential targets in any large country -- there are 5 million commercial buildings alone in the United States -- and hundreds of potential terrorist tactics. It's impossible to defend every place against everything, and it's impossible to predict which tactic and target terrorists will try next.

Security is both a feeling and a reality. The propensity for security theater comes from the interplay between the public and its leaders.

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