Something that a lot of people might not know: Radiation detection equipment is being deployed more and more in government facilities and major public events (such as the Superbowl) to detect people that might be carrying radioactive materials or even nuclear weapons (the latter is highly improbable for many reasons, most of which have to do with how heavy fissile materials are and the requisite size of nuclear warheads). The reason this is now known is because radiotherapy patients are tripping those alarms in public and are being questioned as a result. Geiger counters are in use at this time …