A L.E.O. friend of mine who has been engaged in several shoot-outs (and killed several people) advised me, over a couple beers, that no matter how much training you have, or what you think is your mindset, you're not going to know until it happens to you. And then, when it happens, you're not going to know what you're going to do the next time.

I've carried for twenty years, and keep a gun on the bedstand every night, but I still wonder what I'll do if it ever comes down to it.