U.S. Air Force Airman 1st Class Brian Dowling, right, 27th Aircraft Maintenance Unit crew chief, briefs an F-22 Raptor pilot during Red Flag 17-1 at Nellis Air Force Base, Nev., Jan. 26, 2017. Crew chiefs like Dowling work day or night shifts at Red Flag to enable various exercise missions. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)