A workman on the final assembly of a Pratt and Whitney "WASP" engine. East Hartford, Connecticut. Sourced from the Library… https://www.rawpixel.com/image/12239779/photo-image-face-person-public-domainFree Image from public domain licenseProduction. B-17F heavy bomber. Checking electrical wiring assemblies for B-17F (Flying Fortress) bombers at the Boeing… https://www.rawpixel.com/image/12307336/image-plant-person-artFree Image from public domain licenseProduction. B-17F heavy bomber. At the big Boeing plant in Seattle a woman worker applies identifying numbers to electrical… https://www.rawpixel.com/image/12307389/image-face-plant-personFree Image from public domain licenseThe electric furnace in the foundry of the Farrel-Birmingham Corporation. Ansonia, Connecticut. Sourced from the Library of… https://www.rawpixel.com/image/12325804/image-person-smoke-public-domainFree Image from public domain license