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Colorado's DIY Spirit Made Aviation History
Leaving on a Jet Plane, Don't Know When I'll be Back Again
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![View of a three engine Stinson A passenger airplane with lettering: "[De]lta Airlines," and "U. S. Air Mail Route 2[?]."](/sites/history/files/styles/teaser/public/cdm_22756_0.jpg?itok=T6uYmSxU)