Locations for creating the bomber airfield at RAF Archbury were scouted by director Henry King, flying his own private aircraft some 16,000 miles in February and March 1949. King visited Eglin AFB on March 8, 1949 and found an ideal location for principal photography several miles north of the main base at its Eglin AFB Auxiliary Field No. 3, better known as Duke Field, where the mock installation with 15 buildings (including a World War II control tower) were constructed to simulate RAF Archbury. The film's technical advisor, Colonel John deRussy, was stationed at Maxwell Air Force Base, Alabama at the time, and suggested Ozark Army Air Field near Daleville, Alabama (now known as Cairns Army Airfield, adjacent to Fort Rucker). King chose Cairns as the location for filming B-17 takeoffs and landings, including the B-17 belly landing sequence, since the light-colored runways at Eglin did not match wartime runways in England which had been black to make them less visible to enemy aircraft. When the crew arrived at Cairns, it was also considered as an "ideal for shots of Harvey Stovall reminiscing about his World War II service" since the field was somewhat overgrown.