Armed citizen shoots down mass shooter

[SueDonim]

Thankfully, its not much of an issue from what i can tell, or else we would be hearing alot of such incidents.
Most gun owners over there are largely responsible.

I don't see too many responsible gun owners in the media...

You tend to just see the irresponsible ones in the media. The responsible ones don't create news.

If you do some research on the differing state laws in the US and the gun crime rates, you will find little or no correlation between how tight or liberal the laws are and the danger to the public. What you will find is that some of the safest places are those with concealed carry. Everyone knows that anyone may be armed and the weirdos are less likely to let rip.