When I flew from Stockholm, Sweden, to Chicago, to Sacramento, I got my french horn back and realized that my bell had been folded at the bottom and that the flair before the bell was no longer a circle, but and elipse <**> . I was quite angry. I have a hard case for the horn, but I think security opened the case to check for illigal objects(I can't imagine a horn looks good under an x-ray!). I highly recommend buying insurance for the trombone.