[Untitled photo, possibly related to: Grading at the Greenhills Project, Cincinnati, Ohio]. Sourced from the Library of… https://www.rawpixel.com/image/12252513/photo-image-person-public-domain-natureFree Image from public domain licenseU.S. Army UH-60 Black Hawk helicopters arrive at a mission support site in Nangarhar Province, Afghanistan, June 13, 2018. https://www.rawpixel.com/image/8728180/photo-image-public-domain-helicopterFree Image from public domain licenseU.S. Soldiers with Bravo Company, 1st Battalion, 8th Infantry Regiment, 3rd Armored Brigade Combat Team, 4th Infantry… https://www.rawpixel.com/image/8727829/photo-image-public-domain-person-manFree Image from public domain licenseHiggins speedboats made in New Orleans in a port in the Middle East. Sourced from the Library of Congress. https://www.rawpixel.com/image/12294358/photo-image-person-public-domain-architectureFree Image from public domain licenseA Greyhound bus trip from Louisville, Kentucky, to Memphis, Tennessee, and the terminals. Men sitting by roadside on Sunday… https://www.rawpixel.com/image/12297142/photo-image-plant-person-skyFree Image from public domain licenseA farmer listing his fields under the wind erosion control program. He receives twenty cents an acre for the work. Liberal… https://www.rawpixel.com/image/12264995/photo-image-person-sky-public-domainFree Image from public domain licenseA U.S. Army M109A6 Paladin howitzer, assigned to Bravo Battery, 1st Battalion, 82nd Field Artillery Regiment, 1st Armored… https://www.rawpixel.com/image/8727978/photo-image-public-domain-tableFree Image from public domain licenseLiming a FSA (Farm Security Administration) pasture. Greene County, Georgia. Sourced from the Library of Congress. https://www.rawpixel.com/image/12279593/photo-image-plant-person-grassFree Image from public domain licenseA U.S. Army M109A6 Paladin conducts a fire mission at Qayyarah West, Iraq, in support of the Iraqi security forces’ push… https://www.rawpixel.com/image/8727999/photo-image-public-domain-armyFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Electrically driven mine engine.… https://www.rawpixel.com/image/12290031/photo-image-person-public-domain-manFree Image from public domain license[Untitled photo, possibly related to: Wheat stubble, central Ohio]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12255473/photo-image-plant-person-skyFree Image from public domain licenseJackson, Michigan. Threshing machine in action, front view. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291953/photo-image-plant-person-horseFree Image from public domain licenseAllied soldiers inspect the wreckage of one of the tanks of the German Tenth and Fifteenth Panzer Divisions. Photo made at… https://www.rawpixel.com/image/12294575/photo-image-person-sky-public-domainFree Image from public domain licenseWashington, D.C. President Roosevelt reviewing the Memorial Day parade. Sourced from the Library of Congress. https://www.rawpixel.com/image/12288760/photo-image-plant-people-treeFree Image from public domain licenseJackson, Michigan. Tractor which runs a threshing machine. Sourced from the Library of Congress. https://www.rawpixel.com/image/12290476/photo-image-plant-person-grassFree Image from public domain licenseHolabird ordnance depot, Baltimore, Maryland. These rubber half-track treads cannot be recapped. Extreme care must therefore… https://www.rawpixel.com/image/12294265/photo-image-person-public-domain-architectureFree Image from public domain licenseTruck belonging to oil well driller, Salem, Illinois. Sourced from the Library of Congress. https://www.rawpixel.com/image/12252613/photo-image-person-public-domain-architectureFree Image from public domain licenseMechanical potato digger. Monmouth County, New Jersey. Sourced from the Library of Congress. https://www.rawpixel.com/image/12273724/photo-image-plant-person-grassFree Image from public domain licenseHolabird ordnance depot, Baltimore, Maryland. Periodic complete vehicle inspection is required of all United States Army… https://www.rawpixel.com/image/12294031/photo-image-person-public-domainFree Image from public domain license[Untitled photo, possibly related to: Washington, D.C. Scrap salvage campaign, Victory Program. Unloading metal scrap from a… https://www.rawpixel.com/image/12287979/photo-image-person-public-domain-manFree Image from public domain licenseSalinas Valley, California. Harvesting guayule. Sourced from the Library of Congress. https://www.rawpixel.com/image/12296387/photo-image-plant-person-skyFree Image from public domain license[Untitled photo, possibly related to: New road under construction in Menard County, Texas] by Russell Lee https://www.rawpixel.com/image/12147361/image-plant-person-artFree Image from public domain license[Untitled photo, possibly related to: Grading at the Greenhills Project, Cincinnati, Ohio]. Sourced from the Library of… https://www.rawpixel.com/image/12253712/photo-image-person-sky-public-domainFree Image from public domain license