The event of today's tragedy proves that we need armed security protecting our educational institutions.
Gun laws just make it more difficult for civilians who obey the law to protect themselves while having no adverse effects on criminals because THEY DO NOT OBEY THE LAW. Hence we call them criminals.
Supplying armed security to all educational institutions will also open many more jobs for our citizens and ex military.
Obviously anyone hired to be the security personnel will have to go through evaluations including psychiatric to qualify for the positions.