U.S. Air Force Airman 1st Class Brian Dowling, 27th Aircraft Maintenance Unit crew chief, checks his equipment before conducting preflight inspections on an F-22 Raptor during Red Flag 17-1 at Nellis Air Force Base, Nev., Jan. 26, 2017. Red Flag 17-1 includes not only Raptor aircrews and support, but fellow fifth generation F-35A Lightning II crews. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)