[stephen]

Not sure why you're getting down voted--I remember seeing at least 2 articles go by in the last few years about the Israeli airport security.

Both times it was portrayed as super amazing (low hassle plus high security) precisely because they used behavioral detection techniques.

[Amadou]

The US version of behavior detection isn't even in the same league. The Israelis have guys on the other side of cameras who monitor people from the point before they get out of their cars. Their system is so comprehensive that it would be cost-infeasible to implement here. It also sucks to end up on the wrong end of, over the years there have been a few reports by people who have had that unpleasant experience too.

The TSA version is a guy walking around the terminal engaging people in conversation and looking for things like "micro-expressions." (which are themselves a farce)