Chattanooga’s publicly owned internet network has helped transform the once struggling city into an unlikely marvel of civic reinvention. | Lucy Jones for Vox; Getty Images Most Americans hate their cable companies. But not the 200,000-odd residents of Chattanooga, Tennessee, a city nestled in the Appalachian foothills.  For many people, the city might seem off the beaten path — enough so that when Spain’s national team chose the city as their base during the FIFA World Cup over the summer, the internet exploded with jeers of incredulity. And yet, as many an urban planner, and certain...