Look, I think the writer (the passenger) asks a good question. If a group of terrorists could learn to fly airplanes, could they not learn to play musical instruments. The mere fact that they were indeed musicians does not exclude the possibility that they were practicing an attack. And if there was nothing to worry about, would four air marshalls have been put on that plane? This is a rhetorical question - I am not trying to reveal any secrets here. For air marshalls to stay calm is understandable, but I'm guessing most of the doomed passengers stayed calm enough on 9-11 when they were informed by the terrorists that everything would be ok if they just shut up. Racist? Hardly. Scared out of her wits is more like it. I don't remember any barber shop quartets hijacking airplanes.