31.   But now, after terrorists commandeered four passenger jets Tuesday in a devastating series of suicide attacks, pilots say they must fight back.

32.   But the pilots say that at least one threat went unchallenged.

33.   But the pilots said that their side had made the last offer and that Northwest had stopped negotiating Friday afternoon.

34.   Delta pilots said they were concerned that a deal could limit their flight time and advancement opportunities.

35.   Each time he flies, the pilot said, his single-seater plane is surrounded by three helicopters, with heavy guns trained on the ground below.

36.   Even with all of the electronic navigation aids in place in the future, pilots said it will always be up to them to make crucial navigation decisions.

37.   For obvious reasons, ditching cannot be practiced and airline pilots interviewed say it is not part of training on simulators.

38.   Given that, pilots say, the Yasur is unstoppable under any condition.

39.   Hall said that in crashes involving American crews, safety board experts often cannot agree about what the pilots were saying.

40.   Hall said that in many crashes involving American crews, safety board experts often cannot agree about what the pilots were saying.