Nearly ever mass shooting occurs in gun free zones, Shooters simply want to make a body count, so they go to the least protected area and quickly perform their acts. With media fanning the flames ( as Paul Harvey once mentioned) it has made people want to earn a famous reputation.
Even in journals they write about killing unprotected people.
Those whom have any CCL should be allowed to lawfully carry their firearm, on or about there person. People have a natural right to defend themselves. All people deserve Liberty! The constitution was created for a reason! Why should I have lay my guard down!