In a new interview with Ian Bremmer for GZERO World, former CDC Director Dr. Tom Frieden says that the single most important step to reopening schools in the fall is to control infection in the community. But as of now, too many communities across the United States have lost control of the Covid-19 virus. Opening schools will only become a possibility once a majority of people start practicing the "Three 'W's" ("Wear a mask, wash your hands, watch your distance") and local and federal governments enforce stricter protective policies. The full episode of GZERO World begins airing on US public television on Friday, August 7, 2020. Check local listings.