How do you test out a brand-new, $743 million airline terminal? JetBlue is inviting 1,000 of its frequent fliers to a dress rehearsal of its new JFK terminal. The fake passengers will receive pseudonyms and non-existent flights to catch. They’ll check their luggage, receive boarding passes, go through security, and wait at their gates. Then they’ll turn back around and retrieve their luggage, with hopefully better results than the first passengers at the new British Airways terminal where the automated baggage system broke down.