For those who dismiss "paranoid conspiracy nuts", I'll give you three names and a paraphrase of their own words:

Lyndon B. Johnson: Our purpose is to halt the spread of communism and insure the survival of the democractic government of South Vietnam.
Never mind that South Vietnam NEVER had a democratic government, but a series of military regimes. How many died in the service to our country for that political mistake? How many of those that died didn't even have the...

In a home defense scenario, I'm not there to play games of intimidation or match wits or find out who has the bigger cojones. I am there to defend lives and property. If you enter my house, I must assume that you will do whatever is necessary to avoid being caught, including taking lives. It is very possible that your purpose in my home IS to take life. I do not have the means or desire to determine your mental state and no legal obligation to do so. Do not expect sympathy or understanding. I am...