A question regarding the SQ SIN-MAN-IAH flight - Do through pax SIN<>IAH have to get off at MAN and clear immigration or security and then re-board, or do they just stay on the aircraft?
I think they get off and then just go through the transfers area, but I could be wrong on that. I'm sure I've seen a Singapore Transfer sign in the Arrivals Alleyway leading to Passport Control.