Originally Posted by david7031
Last winter (Xmas), the traffic director said that Mrs. David could no longer use the US Citizens line, because only the Non-Citizens lines have the cameras and fingerprint readers required for non-US citizens.
IME all the desks have all the equipment, because the roles are allocated according to demand and a desk may be switched from "citizens" to "visitors" at any time.
That said, this week Mrs c and I used the visitors line at ORD in preference to the citizens lines, because it was much shorter.