https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8041487
A remnant of the Cornhusker ordnance plants and earthen bunkers, built beginning in 1942 near the town of Alda, outside Grand Island, Nebraska, as bomb- and ammunition-making plant facilities that would employ more than 15,000 people for the war effort during the years of the United States' participation in World War II
Original public domain image from Library of Congress
Public DomainFree CC0 image for Personal and Business use