Unsung Heroines: Hilda Yan Yaqing

This week we highlight one of aviation's great unsung heroines, China's Hilda Yan Yaqing In 1939 Hilda barnstormed the US in her airplane - the "Spirit of China" - to raise funds and awareness for her starving people back home.

Despite all the glory her brave venture brought her for a selfless cause, her name is hardly know today.