January 1941. "Negro church in mill district of Pittsburgh, Pennsylvania." Acetate negative by Jack Delano for the Farm Security Administration. View full size.

January 1941. "Workers' houses near Pittsburgh Crucible Steel Company in Midland, Pennsylvania." Acetate negative by Jack Delano. View full size.

January 1941. "One of the houses in the Negro quarter of Rochester, Pennsylvania. Abandoned glass works in background." Medium format negative by Jack Delano for the Farm Security Administration. View full size.

January 1941. "Scene in west Aliquippa, Pennsylvania. Stacks of the Jones and Laughlin Steel Corporation in background." Medium format negative by Jack Delano for the Farm Security Administration. View full size.

January 1941. "Mill district of Pittsburgh, Pennsylvania. Long stairway in a working class section." Acetate negative by Jack Delano. View full size.

January 1941. "At the steel plant in Midland, Pennsylvania." Medium format negative by Jack Delano for the Farm Security Administration. View full size.

December 1940. "Christmas trees for sale at the market. Providence, Rhode Island." Medium format negative by Jack Delano. View full size.

January 1941. "Outside a large textile mill in New Bedford, Massachusetts." Medium format acetate negative by Jack Delano. View full size.

January 1941. "Textile mill working all night in Lowell, Massachusetts." Acetate negative by Jack Delano for the Farm Security Administration. View full size.

May 1909. "Leopold Daigneau and Arsene Lussier, 'back-roping boys' in mule-spinning room at Chace Cotton Mill, Burlington, Vermont." Glass negative by the child-labor reformer Lewis Wickes Hine. View full size.

December 1940. "Workers eating lunch on curb across the street from the Consolidated Aircraft factory. San Diego, California." Medium format negative by Russell Lee for the Farm Security Administration. View full size.

December 1940. "Workmen during lunch period, across the street from the Consolidated Aircraft factory. San Diego, California." Medium format negative by Russell Lee for the Farm Security Administration. View full size.

November 1938. "Largest smelting furnace in the world. Omaha, Nebraska." Photo by John Vachon for the Farm Security Administration. View full size.

June 1942. East Hartford, Connecticut. United Aircraft plant. "Single-row crankshaft assemblies for Pratt & Whitney airplane engines. The large Eastern plant at which the work is done is producing a steady flow of power installations for the fighting craft of our Army and Navy air forces." 4x5 inch nitrate negative by Andreas Feininger for the Office of War Information. View full size.

February 1943. "Operating a hand drill at Vultee-Nashville, this woman is working on a 'Vengeance' dive bomber." 4x5 inch Kodachrome transparency by Alfred Palmer for the Office of War Information. View full size.