Brookings Bridge Painters, New York, 1914 Photo: Eugene de Salignac
A visitor is looking for a book on a shelf in the Cincinnati library, founded in 1874. Photo: Cincinnati Public Library and Hamilton County.
Construction of the Hoover Dam from 1931 to 1936. Photo: Babcock & Wilcox Company
Testing the first body armor in 1923. Photo: National Photo Company
Men in hats, top view, New York, 1930. Photo: Margaret Bourke White
The ships "Bear" and "S.S. Corwin "make their way through blocks of ice in the waters of Alaska, 1900. Photo by unknown
Race from New York to San Francisco and back. Photo: Detroit Publishing Company Photograph Collection
First rocket launch from Cape Canaveral, Fla., 1950. Photo: NASA
The first successful flight of the Wright brothers, 1903. Photo: John T. Daniels
The disaster of the German passenger airship "Hindenburg". Zeppelin LZ 129 caught fire and was destroyed in 1937. Photo: Gus Pasquerella
