This is a great video to study honesty.  The father of the girl who was given a pat-down at the airport displays two key characteristics that people often associate with lying:  excessive blinking and hard swallowing.   These are signs of nerves.

When I watch the father, I see someone who is very angry about this pat-down and working hard to contain it. His wife is the calm and cool one–that is why she is speaking.  If you notice the husband is listening intently to her, nodding his head as she says what I suspect they both wanted to communicate.