The difference between a military personnel and is civilian is the training received and the permission to be in possession of arms like guns. If no civilian is permitted by laws to posses gun except you are a hunter or so, there won't be fear of being gunned down in schools or public places. Studying the history of mass shootings with statistics from countries with strict gun control like The United Kingdom and Australia where it is almost impossible for a civilian to own a firearm, the last Mass shooting happened in 1996 with an average death of 25persons but after the gun control laws the plaque of mass shooting sublimed, I think it's a good idea if nobody is permitted to buy and use gun with reasonable exemptions. This requires a strong and determined political will to achieved because of the American Culture and believe system. This kind of town hall meeting is a good starting point for revolution not considering the characters involved but the lasting effects on social, economical and political will of the great people of America.