as previously mentioned in this thread:
there is always the possibility that someone is committing murder in your vacinity(one of many examples being the oregon mall shooting previously mentioned in this thread). One must make his/her best judgement and also have the guts to draw their weapon..
Obviously many factors come into play(too many to list). An example is if you have a chance to escape with your children.
That being said, if you are willing to stand up for life and liberty, believe you have a fighting chance, see someone murdering others, you'll know real quick what you decide to do.
NRA Distinguished Life Member
"Abraham Lincoln freed all men, but Sam Colt made them all equal." (post Civil War slogan)