U.S Air Force Honor Guardsmen march in formation during the retirement ceremony of Air Force Chief of Staff Gen. Mark Welsh III at Joint Base Andrews, Md., June 24 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service with military leaders, personnel, friends and family attending the ceremony. (U.S. Air Force photo by Airman 1st Class Rustie Kramer))