SZT3014542: Hoover Dam and the Black Canyon, 1938 (b/w photo) / Bridgeman Images

SZT3014543: Construction of the Hoover Dam, 1933 (b/w photo) / Bridgeman Images

SZT3014545: Night view of the Hoover Dam, 1935 (b/w photo) / Bridgeman Images

SZT3014548: Construction of the Hoover Dam, 1935 (b/w photo) / Bridgeman Images

SZT3014561: Construction of the Grand Coulee Dam, 1938 (b/w photo) / Bridgeman Images

SZT3014574: Car wreck after a fire on an oil field in California, 1926 (b/w photo) / Bridgeman Images

SZT3014576: Burning oil tanks in an oil refinery, 1926 (b/w photo) / Bridgeman Images

SZT3014579: Sikorsky plane S-35, 1926 (b/w photo) / Bridgeman Images

SZT3014590: Melon crop in California, 1928 (b/w photo) / Bridgeman Images

SZT3014591: Grain prices on the Commodity exchange in Kansas City, 1938 (b/w photo) / Bridgeman Images

SZT3014593: Cattle herd in Montana, 1928 (b/w photo) / Bridgeman Images

SZT3013567: Adolf Hitler celebrates christmas with soldiers, 1939 (b/w photo) / Bridgeman Images

SZT3013573: Adolf Hitler (b/w photo) / Bridgeman Images

SZT3013580: Adolf Hitler (b/w photo) / Bridgeman Images

SZT3013591: Camper van, 1927 (b/w photo) / Bridgeman Images

SZT3013592: Mobile home, 1926 (b/w photo) / Bridgeman Images

SZT3013600: Captain of the KdF ship Wilhelm Gustloff with officers on board, 1938 (b/w photo) / Bridgeman Images

SZT3013606: Swearing In Of The Werkscharmaennern (b/w photo) / Bridgeman Images

SZT3013611: Flag of the German Labor Front on the municipal palace in Berlin, 1934 (b/w photo) / Bridgeman Images

SZT3013635: Folk festival during the Nuremberg rally, 1936 (b/w photo) / Bridgeman Images

SZT3013636: Roma meeting in France, 1933 (b/w photo) / Bridgeman Images

SZT3013642: Poland traffic policeman, 1944 (b/w photo) / Bridgeman Images

SZT3013645: Film scene from 'Riding for Germany', 1941 (b/w photo) / Bridgeman Images

SZT3013649: Roma woman with child, 1934 (b/w photo) / Bridgeman Images

SZT3013654: Romanian Jews at forced labor, 1941 (b/w photo) / Bridgeman Images

SZT3013663: Croatian volunteer on the Eastern front, 1942 (b/w photo) / Bridgeman Images

SZT3013666: Croatian volunteer on the Eastern front, 1942 (b/w photo) / Bridgeman Images

SZT3013667: Croatian ground personnel fills the tank of a Messerschmitt Me 109, 1942 (b/w photo) / Bridgeman Images

SZT3013677: Croatian Legionnaires clear out mines, 1942 (b/w photo) / Bridgeman Images

SZT3013685: Dutch volunteers of the Waffen SS, 1942 (b/w photo) / Bridgeman Images

SZT3013699: Fern Andra, 1921 (b/w photo) / Bridgeman Images

SZT3013701: Fern Andra at the 6 day race in Los Angeles, 1935 (b/w photo) / Bridgeman Images

SZT3013715: August Zaleski, 1930 (b/w photo) / Bridgeman Images

SZT3013721: Swearing in ceremony of Walloon volunteers to the Waffen SS, 1941 (b/w photo) / Bridgeman Images

SZT3013722: Wallonian Volunteer Corps of the Waffen-SS in a Firing Position, 1944 (b/w photo) / Bridgeman Images

SZT3013729: Belgian soldiers of the Waffen SS at a machine gun in Russia, 1942 (b/w photo) / Bridgeman Images