Usually we’re told to smile before someone takes our picture. But in some parts of the US, a no-smiling policy is enforced when getting your photo taken for a driver’s license. Because of identity theft, these motor vehicle departments carefully check new photos that are taken to be sure they don’t match photos already in the system. If someone gets a picture taken under a false name, an alarm is sent to the operator. From 1999 to 2009, one state stopped 6,000 people from getting fraudulent licenses. But why no smiling? The technology recognizes a face more easily if the person has a neutral facial expression.
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