Clearly, if only we'd had armed teachers in that NJ police station, no one would have been hurt.

GLOUCESTER TOWNSHIP, N.J. A man being processed on a domestic violence charge grabbed a gun and shot and injured three officers at a police station in southern New Jersey before he was killed.

It happened at the Gloucester Township police station in Camden County.
Police say gunfire erupted inside the station at about 5:45 a.m. Friday.
As the man was being processed on the complaint, he grabbed a gun and began firing. Three officers were hit before the suspect was shot and killed.
Deputy Police Chief David Harkins says one officer suffered a gunshot wound to the abdomen and was undergoing surgery. Two other officers suffered minor injuries.
I've heard that the most common way for policemen to be killed in the line of duty is with their own sidearm.

If a trained officer can have his gun taken and used, how are much less well trained teachers and school administrators to avoid this happening?

If the teachers and administrators lock up their weapons securely to avoid this happening, how can they then respond quickly enough to prevent slaughter by gunfire in the meantime?

If a felon or crazed person (in a registry) cannot obtain a weapon, wouldn't they just go to a school where they know there are weapons, to seize and use one?