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Waldo, Kansas. Waldo is a city in Russell County, Kansas, United States. As of the 2010 census, the city population was 30. Contents.
In the post-war era, Waldo, self-coined as the Great Waldo Pepper, has like many war pilots resorted to barnstorming to make a living. Instead of the penny-ante flights he provides to adoring fans, Waldo wants to join Dillhoefer's flying circus.aldo Pepper was a World War I flight trainer. Waldo believes the honor of the best WWI fighter pilot goes to German Ernst Kessler, although Waldo's flight commander Newt believes that if Waldo had entered the war earlier and had got the flight time, he would have proved himself to be the best.