Welcome Aboard, But First US Marshals Will Scan Your Retina

Halfway down the jetbridge on an international flight outbound from Atlanta, there was a new layer of security. Two US Marshals, heavily armed and dressed in dystopian-style black regalia, stood next to an upright machine with a glowing green eye. Every passenger, one by one, was told to step on a mat and look into the green scanner. It was scanning our eyes and matching that scan with the passport, which was also scanned (yet again).