caption: Diesel engines began to revolutionize American railroading in the mid 1930s. The Rock Island Railroad took delivery of six of these EMD-GM diesel locomotives in the summer of 1937. They were known as the ``Rock Island Rockets''. Notice the Streamline ``Rocket'' script on the side of the engine. Diesel Locomotive, Steam Locomotive, Rock Island Railroad, Air Travel, Diesel Engine, Rockets, Travel Posters, <PERSON>, 1930s
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