Final answer:
The provided information does not directly answer when Irving's moment of inspiration occurred. However, notable aviation milestones, such as Charles Lindbergh's solo flight across the Atlantic and Bessie Coleman's overcoming of barriers, have inspired many in the field.
Step-by-step explanation:
The provided information does not specify when Irving's "moment of inspiration" came as none of the options (a) seeing an airplane as a child, (b) reading about Amelia Earhart as a teenager, (c) flying a solo mission in the Air Force, or (d) meeting a young girl who dreamed of becoming a pilot but couldn't afford flight school are directly mentioned. However, we can discuss aviation history to understand the dramatic impact such figures and events have had on aspiring aviators.
Aviation history saw significant accomplishments that undoubtedly inspired many individuals to pursue a career in flying. The success of the Wright brothers in 1903 with their powered flight and the subsequent advancements in airplane technology paved the way for future aviators. Perhaps one of the most inspiring events was Charles Lindbergh's solo flight across the Atlantic in 1927, where he flew from New York to Paris in the Spirit of St. Louis. Additionally, pioneers like Bessie Coleman overcame racial and gender barriers to achieve their dreams in aviation, becoming a source of inspiration for countless others. Each of these historical moments could serve as an impetus for future generations to take to the skies.