421st EFS 'Black Widows' provide combat airpower
Lt. Col. Thomas Wolfe, the 455th Expeditionary Operations Group deputy commander, performs preflight checks on an F-16 Fighting Falcon at Bagram Airfield, Afghanistan, Feb. 1, 2016. The 421st EFS, based out of Bagram Airfield, is the only dedicated fighter squadron in the country and continuously supports Operation Freedom’s Sentinel and the NATO Resolute Support missions. (U.S. Air Force photo/Tech. Sgt. Nicholas Rau)