As school gets underway and coronavirus cases rise, masks are returning to some American classrooms - and reviving the country's fraught political debate over whether face coverings are common sense or an abridgment of freedom. In Maryland this week, an elementary school principal mandated several days of mask-wearing for a class of kindergartners after at least four people tested positive for the virus. New York's governor announced a plan to distribute free N95 and KN95 masks to schools this f