I found an interesting critique of airport security in an unlikely source — Parade magazine:

…critics say U.S. security strategy still focuses too much on finding bombs rather than bombers. Israel, home to many of the world’s most devastating terror attacks, has a different approach to security….Travelers in Israel are interviewed by highly trained security experts. In the U.S., billions are spent instead on scanning machines and other technology to detect weapons. “The Israelis ask questions, and they profile the situation, not the person,” explains Seth Cropsey, a former Defense Department official. “It’s often a much more thorough approach to security.”

I’d rather submit to some questioning than a virtual strip search any day. Maybe the U.S. could learn something from Israel.