On a practical note, if customs agents are checking immigration papers on domestic flights, will a driver’s license be enough?
I’m now worried because N always – and very aggravatingly – leaves his green card at home when he travels. He’s afraid of losing it. I, on the other hand, always lug around both the green card and the passport. What’s the point of having them if I’m not using them?
As for customs agents, I’ve had a lot of contact with them over the years, and they tend to be a very aggrieved, nervous bunch with very little interest in what’s legal and what’s not.