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.