In this FBI report they conclude that:
Armed and unarmed citizens engaged the shooters in 10 incidents. They safely and successfully ended the shootings in eight of those incidents. Their selfless actions likely saved many lives.
The enhanced threat posed by active shooters and the swiftness with which active shooter incidents unfold support the importance of preparation by law enforcement officers and citizens alike.
It’s so refreshing to hear some recognition that armed citizens help save lives. As did unarmed citizens. Guns are not mandatory in this fight against social chaos and domestic terrorism; however they can be helpful in the hands of the responsible citizens willing to stand up against this threat and defend themselves and all of us. Armed citizens are not the enemy; well, 99.99% of them anyway. Most importantly, those are the ones willing to defend against the remaining 0.01% who seem to want to destroy the world. Make these responsible people your enemy at your own peril.