U.S. Air Force Capt. Shayne Carroll, 4th Expeditionary Fighter Squadron F-16 pilot, and U.S. Air Force Senior Airman Brandon Shinkle, 455th Expeditionary Aircraft Maintenance Squadron crew chief, review preflight checklists for an F-16 Fighting Falcon in preparation for a mission Jan. 9, 2015 at Bagram Airfield, Afghanistan. The F-16 is a multi-role fighter aircraft that provides air superiority enabling freedom of movement for troops on the ground as well as close air support for troops engaged in combat. It provides a relatively low-cost, high-performance weapon system for the United States and allied nations. (U.S. Air Force photo by Staff Sgt. Whitney Amstutz)