21.   Brenda worked in the aviation industry at times, too.

22.   But it is rare to hear such forebodings by an airline executive at a conference intended to celebrate the growth and economic importance of the aviation industry.

23.   But others in the general aviation industry said the violations were no indicator of pilot ability.

24.   But other aviation consultants and observers argued that knowledge of the aviation industry, even if learned for the job, is also a vital piece of the puzzle.

25.   But records show that when Checchi was at the helm, Northwest Airlines was one of the most potent political money machines in the heavily regulated aviation industry.

26.   But security experts in the aviation industry were not surprised to learn that the workers running the scanners at that United Airlines terminal were employed by Argenbright Security.

27.   But several people in the aviation industry said that they believed it did not.

28.   But Mulally said he believes that the demand for air travel will return and that the commercial aviation industry will grow again.

29.   But the anticipated dearth of skilled pilots holds the highest profile, casting an uneven shadow across the entire aviation industry.

30.   But people in the aviation industry doubt they will be used any time soon.