Senior Airman Kristina Macias, 28th Medical Operations Squadron public health technician, salutes Air Force Chief of Staff Gen. Mark A. Welsh III, after being recognized as a superior performer at Ellsworth Air Force Base, S.D., Nov. 26, 2013. Welsh met with Airmen to thank them for their service and discuss current Air Force challenges and opportunities. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)