re: So a good guy with a gun didn't save them

I think it's a valid point. Who knows what was going through the security officer's head, but it's the age old fight or flight dilemma. Lots of people will fight, many with flight. He appears to have chosen flight for unknown reasons. And nobody really knows how they would react the first time they face a situation like that. I'd like to say I'd go in and try to save people, but honestly have idea how I'd react. But it is especially disturbing when someone that is actually trained in that area to fail so badly.

And that highlights one of the problems with the idea of arming teachers.