Km vs miles: For all of you children out there- Our President Ronald Reagan was the one who killed metric conversion in the USA. Horses don't come in metric, I guess, and that was the extent of his disinterest. It had been well underway.
Yet my dang car is metric, my profession is metric, my Coca-Cola is metric, even my A-cat is metric! We would need a miracle to get George W. Bush to advocate (or dis-misunderstand) the metric system.