U.S. Air Force Col. Judy Rattan (left), 97th Medical Group (MDG) commander, passes a guidon to Lt. Col. Sylvia Kim, 97th Healthcare Operations Squadron (HCOS) commander, during a change of command ceremony at Altus Air Force Base, Oklahoma, June 1, 2022. HCOS Airmen oversee resource management, TRICARE operations and patient administration, medical information systems, medical logistics, medical readiness, pharmacy, laboratory and diagnostic imaging. (U.S. Air Force photo by Senior Airman Kayla Christenson)