The threat of gun violence in public spaces across our nation is disconcerting. Indeed, ideologically driven, lethal-shooter attacks represent a considerate threat to national security. Since 1970, more Americans have been killed on U.S. soil due to gun violence than all wars combined. A community need not overreact to security threats, but just hoping that Charlotte escapes gun violence is not a viable strategy. Consider this: While most banks, hospitals, and schools rehearse tornado and fire drills, few bankers, doctors, and students have died from tornadoes or fires in the past decade. Contrastingly, scant resources are devoted to preparing to...