Are there any good stories about guns?

We always hear about all the bad stuff, such as the recent Colorado theater shooting. Whenever something like that happens, it’s on the news, understandingly. I’m sure there are countless minor shootings which, of course, we don’t ever hear about. Whatever involves firearms always brings up the same debates; should firearms be legal to own and carry around or not, and so forth.
This isn’t what I’m wanting to explore though, except it can’t be ignored for my question, at least as a factor for my point…there has to be a reason why in some places firearms are legal. I’m guessing the main reason is self defense.
Has there ever been any good stories about guns? Have you ever heard, either on the news, from someone you know, or perhaps you’ve witnessed/participated in it yourself…any story where a firearm was present, and it helped a situation from getting potentially worse? Say like someone who may have been about to get jumped, but got out of it by pointing a gun at the assailants? Or someone who stopped a robbery, or someone defending themselves or their children with the help of a firearm? Those are not very good examples, but I’m sure they can be valid somehow. Maybe it’s someone who fired a shot in the air to alert a group of some danger, or to calm them down or get their attention, anything goes.

I’m looking for stories where a firearm was used, or at least present, and that which was a significant element in something that may have gone really bad if the gun wasn’t there. Situations where no one was killed, or if they were, that it was justified as total self defense? Situations where if people got hurt, it was minor?

Keep in mind that I’m not talking about things like soldiers in a war, or authority figures like the police, but things that all of us, in our lives could experience in the street or in a public place. Civilians with firearms; any good stories?

Debate is always good and welcome, but please keep in mind that this question isn’t primarily seeking to discuss if firearms should be legal or not.