This time a couple of women explode on a subway in Moscow, and in New York all manner of absurdly armed Robocops rush into the city’s subway with military paraphernalia dangling from all attachment points. Armor. Helmets. Steely gazes. And what appear to be M16s, described by the press as machine guns, which they are not, and as submachine guns, which they are not, and as assault rifles which, if they are selectable full-auto, they are. Nothing like high-velocity full-auto in a crowded subway car. I mean, all of this is so practical.