Afghan air force Sgt. Mohammad Dawood teaches U.S. Air Force airfield management advisors the importance of safety during an aircraft marshalling course at Shindand Air Base, Afghanistan, Feb. 1, 2012. Normally the class is taught by U.S. advisors to their replacements and Afghan maintenance personnel. This marked the first time AAF maintainers have taught a class to U.S. or coalition members. (U.S. Air Force courtesy photo)