IN the days following the Newtown massacre the nation’s newspapers were filled with heart-wrenching pictures of the innocent victims. The slaughter was unimaginably shocking. But the broader tragedy of gun violence is felt mostly not in leafy suburbs, but in America’s inner cities. The right to bear arms typically invokes the romantic image of a cowboy toting a rifle on the plains. In modern-day America, though, the more realistic picture is that of a young black man gunned down in his prime in a dark alley. When we celebrate gun rights, we all too often ignore their disproportionate racial burdens. Any effort to address gun violence must focus on the inner city.