Regarding the intruments there is a funny story from Terry Pratchett about that. Back when he was the PR guy for an atomic power plant and it was open door day. There was a guy who set off the radiation detectors when going in. Now, there is no rule that prevents you from going in radioactive, but they would not be allowed to let him out again. The main problem was of course: how did he get radiated?<br>Turned out he had just dismantled a WWII radium altimeter at his home and still had radium at his hands. <br><br>If you ever were concerned what neighbors might think if police are on your door, imagine what they think when a bunch of guys in yellow hazmat suits go in.<br><br>You can find that story in the book "A slip of the keyboard".