The construction of Boulder Dam, later renamed as the Hoover Dam. Structure of dam erected into canyon. Equipment in tunnels. Giant cranes in operation. Concrete arch-dam in the Black Canyon. Traffic moves on highway over dam. Boat in Colorado River. People sail in boats. Colorado River view. Four intake towers at Hoover Dam. Spillways at Hoover Dam. Hoover Dam power plant to general power. Man points to the map of United States. Electric power setup for the Hoover Dam shows various electric towers, power house and electric lines across desert. Hoover Dam controls water.
Factory workers at A-20 (Fighter-Bomber Army plane) engine line in Douglas Aircraft Factory, Long Beach, California during World War 2, supplying aircraft for the war effort. Women factory workers make adjustments to engines in a Pratt-Whitney engine line. Close up of a woman worker at work on an aircraft engine. African American workmen stack plexiglass parts for bomber aircraft gun or bombing sights. Ex-sailor works on wing of aircraft. Shirtless worker removes an aircraft tire from a rack of tires and rolls it by hand. Propaganda cartoon poster above the rack shows a frightened Hideki Tojo up a tree and reads 'Tokio Kid Say' and shows an attack dog below, keeping him in the tree, and wearing a collar that says, "Conservation," encouraging workers to conserve and use factory resources wisely for the war effort in order to beat the Japanese.
War production workers during World War 2. Two women work on installation for fuel and oil lines in Douglas Aircraft Factory, Long Beach, California. Old men do bench work. They work with various instruments and equipment. Master mechanist instructs a young woman in use of a metal lathe.
Old man works on multiple-bit drill press in Douglas Aircraft Factory, Long Beach, California, during World War 2. Old men work on grinders. Both elderly women and young women war production workers in upholstering department. Women war workers wear protective helmets and shields and serve as welders. They weld parts in the aircraft factory to aid the war effort.
Sailor and worker push the plane together out of hangar at Douglas Aircraft Plant in El Segundo, California. Plane taxis. Commander and two Lieutenants on inspection and acceptance of SBD. Lieutenant inspects under the wing of plane. Sailors and workers at work.
SBD (Scout Bomber) Production Line at Douglas Aircraft Plant in El Segundo, California. Worker installs cartridge box in plane. Chinese boy at work on engine.
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