Since last month’s horrifying and heartbreaking school massacre in Newtown, Conn., politicians and the press have, as everyone knows,..... Other possible factors – from violent video games to the “failure of our mental-health system” to the unintended consequences of making schools “gun-free zones” – have taken a back seat to guns. Within hours of the gruesome mega-crime, the media had provided extensive, round-the-clock coverage of precisely which firearms, manufacturers and calibers the perpetrator had used, how he had obtained them from his mother, where they were originally purchased, and so on. But where, I’d like to ask my colleagues in...