Here is an article by Massad Ayoob about someone who used a fully automatic rifle to defend himself. It goes to show you that even if you do everything you are supposed to, to de-escalate the situation, you present a pretty intimidating deterrent, sometimes that doesn't stop the bad guys. In this case a guy was forced to kill another person, and this article also shows that it sucks, a lot, every time that it happens.
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