A horse cavalry march by as a YO-59 observation airplane is “gassed up” at a service station. Four YO-59s were procured in 1941 and proved so successful that l ater versions became the Piper L-4 “Grasshopper.” Hans Groenhoff

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For the first time I have seen "History" at close quarters,and I know that its actual process is very different from what is presented to Posterity. - WWI General Max Hoffman.