Air Force Hymn From left, Defense Secretary Ash Carter, Air Force Secretary Deborah Lee James, Marine Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, Air Force Chief of Staff Gen. Mark A. Welsh III, and Marine 1st Lt. Matthew Welsh, recite the U.S. Air Force Hymn during Gen. Welsh's retirement ceremony at Joint Base Andrews, Md., June 24, 2016. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro SHARE IMAGE: Download Image: Full Size (2.41 MB) Tags: ASH Carter, SecDef, Chairman, Joint Chiefs, Joe Dunford Photo By: Dominique A. Pineiro VIRIN: 160624-D-PB383-0385.JPG Photo Gallery