I worry about it every time I hear about another shooting. So basically constantly.
I try to tell myself that it's unlikely, or we live in a place it couldn't possibly happen...which is all BS and I know it.
I just have to hope it's something I'll never have to deal with. If I was truly that concerned, I'd have to home school, and that's just not going to happen. So it's basically a low level of constant dread, and it's disgusting that this is where we're at here, because no one wants to face the facts and actually do anything about problem.