“After my Kindle went through the X-ray scanner at Madrid airport, it no longer worked. I had been reading an e-book on the way to the airport so I knew there could be no other reason,” said Michael Hart, from London
Because it's physically impossible for an electronic device to fail when it was working before
I got a headache while on my last flight home. I went through a scanner in the airport. I didn't have a headache when I arrived at the airport. Ergo, airport scanners cause headaches.