An Afghan Air Force soldier stands near his living quarters near Forward Operating Base Oqab, Kabul, Afghanistan, Dec. 13, 2015. Train, Advise, Assist Command-Air (TAAC-Air) advisors have grown the Afghan Air Force since 2006. During this time, the Afghan Air Force has made daily strides toward becoming a professional, capable and sustainable Air Force. (U.S. Air Force photo by Staff Sgt. Corey Hook/Released)