https://techcrunch.com/2018/09/20/delta-to-start-scanning-faces-at-airport-check-in/ > Delta will later this year roll out facial recognition at its terminal at Atlanta International Airport for anyone traveling on an international flight. > The airline said the biometric facial scanning is optional — a move that will shave off a few minutes off each flight — but will help border and pre-flight security authorities before jetting out of the US. It’s the latest roll-out of facial recognition trials at Detroit Metropolitan and New York John F. Kennedy airports.