U.S. Air Force Maj. Gen. Michael G. Koscheski, Fifteenth Air Force commander, and Chief Master Sgt. Sonia T. Lee, Fifteenth AF command chief, visit the 633d Medical Group at Joint Base Langley-Eustis, Virginia, Dec. 2, 2021. Koscheski learned about the surgical capabilities of the unit and how the 633rd MDG medical professionals utilize and implement medical technology and tools during medical procedures. 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)