(From left to right) Ash Carter, Secretary of Defense, Deborah Lee James, Secretary of the Air Force, Marine Gen. Joseph Dunford, Chairman of the Joint Chiefs of Staff, Gen. Mark Welsh III, Air Force Chief of Staff, and Marine 1st Lt. John Welsh stand for the presenting of the colors during Gen. Welsh’s retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

Military leaders, personnel, family and friends gather in honor of the Air Force Chief of Staff Gen. Mark Welsh III, during his retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

The U.S. Air Force Band lineup for Air Force Chief of Staff Gen. Mark Welsh III during his retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

U.S. Air Force Honor Guardsmen march in formation while turning a corner during Air Force Chief of Staff Gen. Mark Welsh III’s retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

U.S. Air Force Honor Guardsmen and Band members perform during Air Force Chief of Staff Gen. Mark Welsh III’s retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

U.S. Air Force Honor Guardsmen perform the presenting of the colors during Air Force Chief of Staff Gen. Mark Welsh III’s retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service with military leadership, personnel, friends and family attending the ceremony. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

U.S. Air Force Honor Guardsmen stand in formation during Air Force Chief of Staff Gen. Mark Welsh III’s retirement ceremony at Joint Base Andrews, Md., June 24, 2016. Welsh retired effective July 1, 2016 after 40 years of honorable military service. (U.S. Air Force photo by Senior Airman Joshua R. M. Dewberry)

U.S Air Force Band members perform 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. (U.S. Air Force photo by Airman 1st Class Rustie Kramer)

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))

U.S. Air Force Band members depart 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. (U.S. Air Force photo by Airman 1st Class Rustie Kramer)

Col. Larry Lang, U.S Air Force Band commander/conductor, leads the band during a performance for 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)

U.S Air Force Band members perform 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. (U.S. Air Force photo by Airman 1st Class Rustie Kramer)