Senior Airman Rendall Powell, 412th Test Wing, receives a COVID-19 vaccination shot from Lt. Col. Yvonne Storey, 412th Medical Group, at the Airman and Family Readiness Center on Edwards Air Force Base, California, Aug. 25. Secretary of Defense Lloyd J. Austin III issued a memorandum directing mandatory COVID-19 vaccinations for service members. John F. Kirby, Pentagon press secretary, said only Food and Drug Administration-approved vaccines will be mandatory. (Air Force photo by Katherine Franco)