On this week's "Face the Nation," with the highly contagious Delta variant on the rise, some officials are calling for a return to mask wearing -- even for fully vaccinated people. Former FDA Commissioner Scott Gottlieb joins us with his analysis. On this Fourth of July weekend, can we declare independence from the coronavirus? We'll talk to White House COVID-19 Response Coordinator Jeffrey Zients about the Biden administration's vaccine push. Surfside, Florida Mayor Charles Burkett joins us with the latest on the search and rescue operation in the condo collapse. Utah Governor Spencer Cox talks about how local leaders can increase vaccinations as the Delta variant spreads. As the West experiences historic heat waves, severe droughts, and wildfires, Oregon Governor Kate Brown joins us to discuss how she's working with the Biden administration to address the climate crisis. A new Pentagon report confirmed the government still has no explanation for reports of unidentified aerial objects. Rep. Andre Carson (D-IN) joins us to discuss what comes next in addressing unexplained phenomena.