Kurt and Hal Gottschalk exercising with a medicine ball in a reproduction of an illustration for the book "Kinder-Turnen in Haus" by Fritz Strube. Sports

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Japanese naval forces parade along Nanjing Road in Shanghai; Nazi flag in the background Street Scenes

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Portrait of Herman Sommerfeld (right) with two unidentified pilots of the naval air force; Adlershof bei Berlin Portraits Men

Caption reads: Werftbild Abtl Flugzeugmeisterei Adlershof bei Berlin 1917

Kurt and Hal Gottschalk exercising with a medicine ball in a reproduction of an illustration for the book "Kinder-Turnen in Haus" by Fritz Strube. Sports

Digital Image