Arming our schools

In another thread a participant H2O

http://able2know.org/topic/205801-1#bottom

….asks that in addition to early health-care intervention how we can also I don't know, I just don't know

But the idea of an armed guard U stationed at each school is kind of scary. I imagine classes are held in Buildings C and D, for instance, while for some reason he's stationed at Building B. At D where the gunman V is loose, several minutes elapse before a teacher W, from nearby gymnasium A, hearing shots, rushes toward D to investigate, upon entering the room only to be shot herself before another passerby X is able to report the incident to U

But then U, mistakenly running running from B toward C with gun in hand, (having misunderstood X to say "C", sounding in the confusion much like "D") is tackled to the ground by a student football player Y heading for his locker room E between buildings B and C, having heard the shots and seeing U's weapon supposing him to be the the unsub. By the time this encounter is straightened out and after subduing Y, now U finally reaches D, while V had run out of bullets and dropped his gun

Meanwhile however student Z of the anguished classroom picks up the gun in dazed curiosity, whereupon U rushing in shoots him, having mistaken him for V, who then escapes