Every twenty years or so, we don the mask. The author on a uniquely American phenomenon.He's a fairly ordinary, middle-class fellow who doesn't act as though he wields near-godlike power. But he's nearly unstoppable, capable of besting any imaginable enemy, and yet he seems perfectly content with his lovely wife, three kids, and a nice house in the suburbs. Or…almost content, anyway. Despite the edicts of self-righteous lawyers, carping media twits, and nitpicking politicians, he patrols the bad alleys of his city, looking for the kind of trouble that only he can stop. Oh, he's been accused of being the...