But that's not a guarantee. Shootings happen all over America and lots of us have guns. They don't all happen at schools, that movie theater in Colorado (a red state) should have had someone with a gun. Did they stop it in any way shape or form? Nope. Just because a gun is present doesn't mean it will even be used. People discussed how bad the security was at the concert and that armed security guards should have been present. Metal detectors should have been there. Now France realizes this and will almost guaranteed make the steps necessary to make venues like that much safer. Saying a gun in there would solve everything is rather a small way to look at this.