Could something you're doing at the airport make you a target for extra security screening?
The TSA's "Operation Quiet Skies" program recently came to light. It involves agents analyzing the body language of certain passengers.
Body Language expert Renate Mousseux says you can learn a lot from just observing people closely.
Mousseux says body language is hard to fake for more than a few minutes and generally crosses cultural boundaries.
Operation Quiet Skies involves observing certain passengers to see if they're fidgeting, sweating or blinking excessively. Also, if they see the traveler rubbing their hands and sleeping.
Mousseux says you can also learn a lot from how people stand and even walk.
Looking off and to the left while being questioned can be a sign someone is lying Mousseux says.
The key she says is to assess the message the person's entire body is sending, not just one part of their body, like their arms.