Four ships, one mission
U.S. Air Force Maj. Steve Strasbaugh, left, 351st Air Refueling Squadron instructor pilot from Watonga, Okla., and U.S. Air Force Capt. Steve Briones, 351st ARS copilot from El Paso, Texas, go through their preflight checklist Sept. 5, 2014, on RAF Mildenhall, England. Before every flight, aircrew members confirm all of the aircraft’s components are functioning properly to ensure a safe flight. (U.S. Air Force photo/Senior Airman Micaiah Anthony/Released)