U.S. Air Force Master Sgt. Nicholas Ward, a 35th Aircraft Maintenance Squadron maintenance cell boss, walks down the flight line during VIGILANT ACE 18 at Osan Air Base, Republic of Korea, Dec. 5, 2017. The responsibilities of a cell boss includes ensuring his personnel, six F-16s and everything that comes along with quality of life and maintenance issues is top notch for mission success. (U.S. Air Force photo by Staff Sgt. Deana Heitzman)