Originally Posted by
why fly
I was on my way home from PVG via ORD last week and tried to use my Nexus pass instead of passport.. I did not have my Canadian passport with me as its full, and at passport office getting replaced. I didnt want to use the other passport and have to get fingerprinted. Anyhow they cannot use Nexus card, or that officer didnt know how.

That's extremely dangerous. All you need is a grumpy/arrogant officer and you're kicked out of the program. Your Nexus is linked to your passport, and having a full passport is no excuse to not carry it, even if it's at the passport office (in these cases you pay the fee to expedite it). I've had several cases where the officer ignores my nexus card and asks for my passport when I'm not using a machine.