Delta Air Lines and US Airways are making a last-ditch effort to save a slot swap that would give Delta a dominant presence at New York's LaGuardia Airport and US Airways the same at Reagan Washington National Airport.In the process, the carriers are simultaneously challenging the FAA and offering to partially accommodate it; pitting four U.S. and Canadian low-cost carriers against the biggest U.S. low-cost carrier, Southwest Airlines; and again raising the larger question of who actually owns takeoff and landing slots at U.S. slot-controlled airports.
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