1934 photograph of Germany's Karlsruhe in San Diego Bay. Karlsruhe was a light cruiser operated between 1929 and April 1940. She was built by the Deutsche Werke shipyard in Kiel, launched in August 1927 and commissioned into the Reichsmarine in November 1929. She served as a training cruiser for naval cadets throughout the 1930s. (Photo by Erickson)