One useful fact all Americans should keep in mind is that they have no "right" to be protected by the police. American police are reactive, not proactive. They don't usually "prevent" crime. They catch lawbreakers after they have committed a crime. This was by design of the Founding Fathers. Because, as we see today with the anti-terrorism laws, in order to "prevent" crime, police would need all sorts of obnoxious powers that would trample all over our rights of life, liberty and property. Instead, Americans were intended to have the means of self defense. Put another way, the Constitution does...