The Great American State Fair opened on the National Mall this week, but the heartland is already the focus of international attention. As the United States, Canada, and Mexico host the World Cup, soccer fans from around the world are crisscrossing this country, gawking at the sheer abundance they find in our stores and restaurants. Their astonishment is a helpful reminder of what makes America great. It gives the lie to the critics of the American way, both on the far right and left at home