The Use of Deadly Force
Take out a $100 bill. Let's make a bet. If I win the bet then I get your $100. If you win the bet then you get to keep your $100. Is that a good bet? That, my friends, is a gun fight. YOU RISK EVERYTHING AND YOU DON'T WIN ANYTHING. YOU JUST GET TO KEEP WHAT YOU HAVE. Gun fights should be avoided like the plague but if you find yourself in a gun fight then you will be happy that you have trained to win. It is not near enough to own a gun. The gun is only the tool. YOU must be the craftsman and know how to use that tool skillfully.
When is it justifiable to use deadly force?
You are universally justified in the use of deadly force when there is a reasonable fear of immediate or otherwise unavoidable danger of death or serious bodily injury to the innocent. All these factors must be present in order to justifiably use deadly force. Lacking any one or more of the key factors will result in a questionable use of deadly force and you will face the criminal and civil consequences.
REMEMBER: Gun fighting is risky business. You risk everything and you don't win anything. At best you just get to keep what you already have. Those of you out there who own guns and carry them for protection I would urge you to get out and train to win.