The U.S. Centers for Disease Control and Prevention (CDC) issued a “strong recommendation” that all passengers and employees on airplanes, trains, subways, buses, taxis and ride-share vehicles should wear masks to prevent the spread of COVID-19. The interim guidance also calls for facial coverings at transportation hubs like airports and train stations. “Broad and routine utilization of masks on our transportation systems will protect Americans and provide confidence that we can once again travel more safely even during this pandemic,” the CDC said. Airlines, Amtrak and most public transit systems and US airports already require all passengers and workers to wear facial coverings through local or private mandates, as do most airports, as well as the ride-sharing firms Uber and Lyft.  The Trump administration has blocked attempts to create federal mandates making mask-wearing on transit required and enforceable.