Chicago, Illinois. As each car goes by his window at an Illinois Central Railroad yard, the engine foreman checks it against… https://www.rawpixel.com/image/12290607/photo-image-face-paper-handFree Image from public domain licenseHalftrac scout cars. Laying the foundation of another power plant for an Army halftrac scout car. An engine block, already… https://www.rawpixel.com/image/12306730/image-plant-person-factoryFree Image from public domain licenseProduction. B-17F heavy bomber. Electrical wiring assemblies for B-17F (Flying Fortress) bombers are made up on forming… https://www.rawpixel.com/image/12307352/image-face-plant-handFree Image from public domain licenseConversion. Pianos to airplane motors. From musical instruments to instruments of death. Edward Groe, Nowegian-born employee… https://www.rawpixel.com/image/12307755/image-hand-person-artFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. A gear for a Pratt and Whitney engine is tested for hardness on a Rockwell… https://www.rawpixel.com/image/12308170/image-face-plant-handFree Image from public domain licenseProduction. Aircraft engines. Woman's place is on the inspection line in this Midwest aircraft plant where increasing… https://www.rawpixel.com/image/12306839/image-face-plant-handFree Image from public domain license