I was a cop once. It was only once, and only for a few weeks. Nevertheless, I must confess that once I was a fully-fledged officer of the law—with a blue uniform, a black duck-billed hat, a shiny badge pinned on my chest, a walky-talky hung at my side (this was long before the rise to ubiquity of cell-phones), a bully-stick in a holder on a leather belt studded with bullets, and a holster with a loaded handgun in it. I even bought myself a pair of mirrored sunglasses to complete the outfit.