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The working titles of this film were Ground Crew and Northern Flight. In an onscreen prologue, the filmmakers dedicate the film to the aviation pioneers of America. According to a Hollywood Reporter news item, scenes from the movie were shot at Grand Central Air Terminal in Glendale, CA. Reviewers commented on the similarity between the "arctic mapping flight" that was featured in the film and millionaire aviator Howard Hughes's trans-world flight, which was completed shortly before the film's preview screening. According to Motion Picture Herald, during a production meeting that took place after the film's California preview, it was suggested that the RKO advertising department use newsreel footage of Hughes's record-breaking flight as part of the movie's trailer. Hughes made his trip in a twin-engined Lockheed in three days and nineteen hours. Modern sources note that Lockheed 12, Ryan ST and Stinson Reliant airplanes were used in the production.