Air travel, buffeted by an unprecedented number of flight delays and cancellations, has become more nerve-wracking except among one particular flight-dependent contingent: the airport foodservice operators who are crediting sales increases of up to 30 percent to departure logjams at terminals nationwide.Whether air travel chaos can be blamed on a burgeoning number of passengers, gridlock in the skies, an antiquated air traffic control system, extra security since 9/11 or bad weather, the ...

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