Lt. Col. Michael Meyer, 421st Expeditionary Fighter Squadron commander, deployed from Hill Air Force Base, Utah, performs pre-flight checks on an F-16 Fighting Falcon at Bagram Airfield, Afghanistan, Oct. 30, 2015. Airmen assigned to the 421st FS, known as the “Black Widows,” arrived here Oct. 28, 2015 in support of Operation Freedom’s Sentinel and NATO’s Resolute Support mission. (U.S. Air Force photo/Tech. Sgt. Robert Cloys/RELEASED)