I think that's the main danger - not just with the US, but with ANY country. Look at how many people think of themselves as good drivers. One only has to look at the causes of many traffic accidents to realise that their 'expertise' is questionable at best.
You often hear of soldiers who go to pieces when the firing starts. These are men and women who have undergone (one imagines) significantly more training than the avarage civilian who just fancies owning a gun. Being trained is no guarantee that you will not fall apart in a live situation where you're shooting at something more threatening than a paper target or a deer.
The argument that things would have been resolved quicker and without as much bloodshed had there been another armed person present is plausible, but in no way definite.
What if they weren't quite as good a shot with a live target as a practise one?
What if they froze?
What if they missed and hit a civilian?
What if the headcase had shot them first and taken their gun(s) as well as his own?
I'm not saying that there aren't people who could have helped, just that having another armed person on scene may have made things worse, if anything.
You often hear of soldiers who go to pieces when the firing starts. These are men and women who have undergone (one imagines) significantly more training than the avarage civilian who just fancies owning a gun. Being trained is no guarantee that you will not fall apart in a live situation where you're shooting at something more threatening than a paper target or a deer.
The argument that things would have been resolved quicker and without as much bloodshed had there been another armed person present is plausible, but in no way definite.
What if they weren't quite as good a shot with a live target as a practise one?
What if they froze?
What if they missed and hit a civilian?
What if the headcase had shot them first and taken their gun(s) as well as his own?
I'm not saying that there aren't people who could have helped, just that having another armed person on scene may have made things worse, if anything.