On a recent trip to Canada, I had the pleasure of standing in front of a retinal scan identification machine at customs and before I knew it, a ticket popped out of the machine and I was on my way with not even the need to show my Nexus card. No hassles whatsoever. As I understand it, the machine reads the blood vessel pattern of the retina on my eye and matches it up to the one I took to add to my Nexus card. Unbelievable where technology is today!
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