If you want to try the Triple Delight roll at Gachi House of Sushi, the crab frittata at Obrycki's or the Latin specialties at Zona Cocina, you'll have to buy a plane ticket. These eateries, which only exist at BWI Thurgood Marshall Airport, are in post-security areas, and you can only eat there if you have a boarding pass.
And if you don't believe you can get super-fresh, premium sushi at an airport, try asking your pilot. They'll tell you that Gachi, a full-service sushi bar on Concourse A between gates 8 and 9, is the real...