A friend recently shared what happened last year during a holiday visit to her parents’ house. While looking for medicine to soothe a headache, she opened a drawer and found a loaded, unsecured gun. As the mother of two young children, she was shocked that her parents would have left a loaded gun in a drawer within reach of her curious children. It would be a tragedy for any family to experience an accidental injury or death due to an unsecured firearm this holiday season. But given the prevalence of unlocked guns in homes across the country—1.7 million homes have unlocked, loaded guns...