Originally Posted by Sopwith

Possibly this has been answered, but I haven't gone through the 5000+ posts in this thread, so forgive me. I used Nexus at US immigration for the first time today, expecting to need the card (of course! Why else would they give you the fancy card with RF chip, photo, etc?) I needed it to get into the priority security line, but didn't need it at Immigration. Do they rely com-letely on the iris scan, or does the kiosk read the RF chip from the card in my pocket? In which case I guess I will need to take it out of the fancy copper-lined envelope.