U.S. Air Force Chief of Staff Gen. Mark A. Welsh III, addresses U.S. Service members during an all call at Langley Air Force Base, Va., April 27, 2015. Welsh spoke to Airmen throughout the installation in an effort to complete a comprehensive assessment of Air Force needs, as well as a way to see the successes and challenges Airmen are faced with. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)