You start referring to cities by airport code rather than by name. CATHRYN I. WANDERS, CEM, EXHIBIT OPERATIONS MANAGER, OPTICAL SOCIETY OF AMERICA, WASHINGTON, D.C. You start relying on your cellphone knowing which time zone you're in before you do. You realize that the seats in the lavatory are more comfortable than your assigned seat in coach. JEWEL E. CRIPE, COURTESY ASSOCIATES, WASHINGTON, D.C. You're actually relieved that, due to bad weather, you have either missed your ...

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