Police and security tend to be prejudiced. If a little girl is killed in Germany they look for males between 18 and 40 and among those males they look for former offenders and if the girl has a stepfather they grill him. They are making guesses from past experience. That can lead them astray but usually this method of searching is better than a random search from telephone book entries.

I wonder what they should do: Make the radiation monitoring openly? ("Slow down. DC radiation monitoring checkpoint") Not do any radiation monitoring? Make the radiation monitoring on repesentative samples only? ("Excuse us but your home has been drawn this morning by a random number procedure for today's radiation check in Oklahoma").

Wolfgang