Chicago is a tragically violent city, but this Fourth of July weekend was one of the bloodiest in memory, with The Chicago Tribune reporting 68 gunshot wounds between Thursday night and Sunday and fourteen gun deaths. The victims included a 14-year-old boy who was killed by police and a 66-year-old woman whose head was grazed by a bullet while she was on her porch. Of those wounded, five were shot by police—two fatally …