Since 9-11, The Transportation Security Administration has spent about $1 billion training thousands of “behavior detection officers” to look for facial expressions and other body language that could identify terrorists.
So how good are you at spotting liars? We've always been taught that people will look away when lying or indicate that they're not telling the truth through other body language. University of Chicago study on body language puts you to the test. Take this test here and see how good you are at reading body language.