Originally Posted by PTahCha

This threads reminded me of my first international flight on CO, LGA-IAH-LIR. I was using a non-US passport, and sure enough, the machine beeped at IAH, and they had to do a secondary passport check, even though the agent at LGA had to manually verify the passport because the kiosks kicked me out of the check-in process due to doc check.

Yes, I did a as I pulled my passport out one more time. Was I humiliated or embarrassed? Hardly.