U.S. Air Force Col. Dustin P. Smith, Headquarters U.S. Air Forces Central Command chief of staff, thanks his wife, Col. Kristine B. Smith, 710th Combat Operations Squadron deputy director from Joint Base Langley-Eustis, Va., at the end of his retirement ceremony, July 14, 2017, Shaw Air Force Base, S.C. The former USAFCENT chief of staff retired after 26 years of service. (U.S. Air Force photo by Senior Airman Christopher Maldonado)