I know it's old-ish news, but I just heard about it in an engineering class recently while we were talking about ethics. Apparently two guys, one a member of the KKK, decided that they would try to hack some medical equipment into a serviceable X-ray "cannon" that would expose those they deemed "enemies of Israel" (read: Muslims) to a lethal dose of radiation. Thankfully, they were caught in time by law enforcement. But the story still kind of frightened me. I know it's a bit of a heavy subject for PF (involving some not-too-cheery subjects like racism and terrorism) but I really feel I need to ask...what if they hadn't been caught? Would such a device even be feasible, do I need to worry about lunatics running around with deadly homemade radiation guns?