I just was at the Paris Orly Airport and let my iPad go through the x-Rays as I did many times before.
Because it was boring wating in the cue, I was reading on the iPad and I do not know if I swiched the screen of or not.
but when I took the iPad from the band and wanted to read again it had a unreadable, multicolourd stripe of about 4 cm in the middle of the screen. This stripe turned to be black after some days. Touch still works, but not the screen...
Could be a funny coincidence, but I suspect the x-rays to have destroyed my iPad.