U.S Air Force Tech. Sgt. Nathan Raab instructs an Afghan Air Force loadmaster inside of an Afghan Air Force C-130H Hercules at Hamid Karzai International Airport, Kabul, Afghanistan, Dec. 6, 2015. Raab’s mission is to train, advise, and assist our Afghan partners to develop a professional, capable, and sustainable Air Force. (U.S. Air Force photo by Staff Sgt. Corey Hook/Released)