Construction of new buildings on the main street of Childersburg, Alabama. Sourced from the Library of Congress. https://www.rawpixel.com/image/12279233/photo-image-person-sky-public-domainFree Image from public domain licenseColumbia Steel Company at Geneva, Utah. Bulldozer used in grading during the construction of a new steel mill which will… https://www.rawpixel.com/image/12297354/photo-image-person-sky-public-domainFree Image from public domain licenseBusiness Industry Manufacturing Factory Concept https://www.rawpixel.com/image/1073661/free-image-rawpixelcomView licenseHome of construction worker at Shasta Dam. Summit City, California. Notice that the trailer has been incorporated into the… https://www.rawpixel.com/image/12149639/image-dog-art-vintageFree Image from public domain licenseBusiness Industry Manufacturing Factory Concept https://www.rawpixel.com/image/960473/free-image-rawpixelcomView licenseMorenci, Arizona. Loading copper ore from an open-pit copper mine. Sourced from the Library of Congress. https://www.rawpixel.com/image/12293521/photo-image-sky-public-domain-archFree Image from public domain license