The City of Kennesaw's ordinance requiring every head of household in the city to "maintain a firearm, together with ammunition" According to Federal statistics, something like 2,000,000 crimes are prevented or stopped each year by private citizens and their guns.
If you think back on mass shootings in our history, just remember that one law-abiding citizen in those public venues carrying a weapon could have put an early end to those rampages.... http://www.rense.com/general9/gunlaw.htm