I would say that it was a possible tragedy avoided, but you should read how they reacted......
http://www.nydailynews.com/ny_local/2011/10/22/2011-10-22_at_school_with_mas_gun.html
http://www.nydailynews.com/ny_local/2011/10/22/2011-10-22_at_school_with_mas_gun.html