21.   Airlines mostly have used the southern, or terminal side of the access road.

22.   Airlines use seniority to determine who flies popular routes at convenient times and who is stuck flying to undesirable locations on holidays.

23.   But Bergt said the computer systems allowed any airline to use any counter in case passenger lines backed up.

24.   But even more important for attracting passengers from smaller but growing cities is that the airlines can use them to create more nonstop flights.

25.   But most airlines still use seats of the same dimensions, using the extra space for a wider aisle.

26.   But the airline has been using bag matching at selected airports for the last two weeks and it has gone well, he said.

27.   But with business air fares soaring nationwide, there is a growing debate under way about whether big airlines increasingly are using their growing market power to hamper competition.

28.   California-based airline consultant Phil Roberts, who has friends at Delta, said the airline used to micromanage its business, failing to empower its employees.

29.   Clinton called for a nationwide system of reporting medical errors, somewhat like the system used by airlines to report aviation safety hazards.

30.   Demand is strong for so-called regional jetliners that are used to feed passengers from smaller cities to major airports that airlines use as hubs.