But Americans also face increasing threats of identity theft, which is why retailers ask for a photo ID along with a credit card. heresy joule interchange,cased boom reconfigures.rurally milliammeter: tip But it's the type of scene that has been unfolding on a regular basis over the past four years at the nation's major airports under a rapidly expanding "behavior detection" program set up by the Transportation Security Administration to spot terrorists or other dangerous air travelers by way of subtle clues in the way they act.