Air Force Chief of Staff Gen. David L. Goldfein passes the guidon to Gen. Arnold W. Bunch, Jr., incoming Air Force Materiel Command commander, during an assumption of command ceremony inside the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio, May 31, 2019. AFMC manages the research, development, acquisition, test and logistics services that keep Air Force weapon systems and warfighters ready for combat. (U.S. Air Force photo by Wesley Farnsworth)