Follow @ra7s
Armed Civilians Don't Stop Mass Shootings
Here is a counter example   San Antonio's Santikos Mayan Palace 14 theater.
Here is another counter example   San Antonio
Clakamas Oregon and another example
Appalachian School of Law in Grundy Virginia
Winnemuccka Nevada incident mentioned in passing the focus is more on Gun Free Zones
Winnemucca, Nev., 2008: Ernesto Villagomez opens fire in a crowded restaurant; concealed carry permit-holder shoots him dead.