[Untitled photo, possibly related to: Drilling operations and derricks. Kilgore, Texas] by Russell Lee https://www.rawpixel.com/image/12174752/image-cloud-art-skyFree Image from public domain license[Untitled photo, possibly related to: Pouring molten gold into brick. El Dorado Canyon, Clark County, Nevada]. Sourced from… https://www.rawpixel.com/image/12275074/photo-image-person-gold-public-domainFree Image from public domain licenseChristiansted, Saint Croix Island, Virgin Islands (vicinity). FSA (Farm Security Administration) borrower and his wife in… https://www.rawpixel.com/image/12280187/photo-image-face-people-artFree Image from public domain license[Untitled photo, possibly related to: Yauco, Puerto Rico. Slum area in the coffee town]. Sourced from the Library of… https://www.rawpixel.com/image/12280080/photo-image-person-sky-roadFree Image from public domain licenseJones Laughlin steel company. USHA (United States Housing Authority) housing project on top of hill. Pittsburgh… https://www.rawpixel.com/image/12287084/photo-image-cloud-sky-public-domainFree Image from public domain licensePart of Archer-Daniels Company grain elevator. Minneapolis, Minnesota. Sourced from the Library of Congress. https://www.rawpixel.com/image/12282545/photo-image-person-sky-public-domainFree Image from public domain licenseWest Mine, West Frankfort, Illinois. Now abandoned. Franklin County, Illinois. This mine has been down about a year (see… https://www.rawpixel.com/image/12274424/photo-image-sky-technology-public-domainFree Image from public domain licenseConstructing sealed bin for shelled corn storage. Marshall County, Iowa. Sourced from the Library of Congress. https://www.rawpixel.com/image/12273308/photo-image-face-hand-personFree Image from public domain licenseScreening plant for separating ore scram (lower grade ore). Mahoning pit, Hibbing, Minnesota. Sourced from the Library of… https://www.rawpixel.com/image/12285030/photo-image-plant-person-woodFree Image from public domain license