We are not in a war zone, but we might as well be. A frequent factor in these violent incidents is mental illness. In many — but not all — of these incidents, the weapons used to wreak havoc were obtained legally. This is not a proposed assault on the Second Amendment. There is, of course, no way to avoid all gun violence. But there is a clear choice we must ultimately make: What kind of society do we want to inhabit — one in which we risk our lives to watch a movie, go shopping or enter a classroom? Or one where capable and responsible adults are free to own guns but every effort is made to weed out those who could turn violent?