KC-135 Stratotankers from Fairchild Air Force Base, Washington, and MacDill Air Force Base, Florida, prepare for departure on the flight line during Red Flag 18-2 at Nellis Air Force Base, Nevada, March 12, 2018. Red Flag provides realistic combat training in a contested, degraded and operationally limited environment while also testing units’ abilities against some of the military’s premier aircraft. (U.S. Air Force photo/Senior Airman Janelle Patiño)