Final answer:
Barrington Irving's solo flight was extraordinary as it continued the legacy of aviation pioneers like Charles Lindbergh and Bessie Coleman, overcoming skepticism about long-distance air travel and advancing the field of aviation.
Step-by-step explanation:
Barrington Irving's solo flight around the world was extraordinary due to several reasons. First, it challenged the prevalent skepticism of the time about long-distance air travel. Orville Wright himself doubted the capability of airplanes for such feats. Barrington Irving's achievement mirrored that of Charles Lindbergh, who, in 1927, dispelled these doubts by flying solo across the Atlantic Ocean in his monoplane, the Spirit of St. Louis. Irving's journey can be seen as a continuation of pioneering the skies, an inspiration built upon the legacies of past aviators like Lindbergh and Bessie Coleman, who advanced aviation in the face of societal limitations and technological hurdles.