Air and Space Conference - Gen. Mark A Welsh III's keynote speech
Air Force Chief of Staff Gen. Mark A. Welsh III honors two fallen special tactics Airmen during his Air Force Update address at the Air Force Association's Air and Space Conference and Technology Exposition Sept. 15, 2015, in Washington, D.C. Capt. Matthew D. Roland and Staff Sgt. Forrest B. Sibley were killed Aug. 26, 2015, in Afghanistan. (U.S. Air Force photo/Scott M. Ash)