A free and open Internet has been the lifeblood of America’s innovation economy, not just in Silicon Valley, but in cities and towns all over America. Last year, after watching the U.S. government threaten the Internet with bills like SOPA and PIPA, Internet entrepreneurs from Reddit set out on a tour bus from Denver, Colo., to Danville, Ky., to “campaign for the Internet” during the 2012 presidential election season. Their journey was captured by filmmakers...