Not Kidding:

Behavior detection officers work in pairs. Typically, one officer sizes up passengers openly while the other seems to be performing a routine security duty. A passenger who arouses suspicion, whether by micro-expressions, social interaction or body language, gets more serious scrutiny.

A behavior specialist may decide to move in to help the suspicious passenger recover belongings that have passed through the baggage X-ray. Or he may ask where the traveler is going. If more alarms go off, officers will “refer” the person to law enforcement officials for further questioning.

I feel ‘freer’ every day.

Via Daily Rotten