I was on Campus at Texas when Whitman shot up the place. lots stood around until one lone police officer stormed the tower and shot him.
Lots of "security guards" just want the paycheck and would not risk their life. That being said, if schools had armed security like say the local bank, then that's a great deterrence but not a cure.
“..... if schools had armed security like say the local bank, then that’s a great deterrence but not a cure.”......
Deterrence yes, cure no. We don’t know if armed security guards would do any different that office Peterson. It all depends on the individual and how they react to a given situation.