I will be transferring through Chicago from an international flight. O'Hare has Automated Passport Control (APC) kiosks. Information online states:
APC can be used by all U.S. and Canadian passport holders, as well as international travelers with Electronic System for Travel Authorization (ESTA) approval.
However, I've passed through Chicago before, and then I remember signs saying you could only use it if you'd previously entered the United States (and possibly only if that entry was on the same passport). Since my companion hasn't entered the United States before, I'd like to know if this is (still?) the case.