U.S. Air Force Chief Master Sgt. Sonia T. Lee, left, Fifteenth AF command chief, receives a brief from Col. Kathleen Mackey, 633rd Medical Group commander, during an immersion tour at Joint Base Langley-Eustis, Virginia, Dec. 2, 2021. Lee learned about protocols and procedures implemented by the Med Group during the COVID-19 pandemic. Base visits allow senior leaders to interact with service members to see first-hand some of the successes and challenges faced at different installations across the Air Force. Joint Base Langley Eustis is the only joint base in Air Combat Command. (U.S. Air Force photo by Staff Sgt. Delaney Gonzales)