Freight train operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. The crew, with… https://www.rawpixel.com/image/12291082/photo-image-person-sky-public-domainFree Image from public domain licenseLititz, Pennsylvania. Postmaster Robert Pautz chatting with two friends in the post office. He has three sons and one son-in… https://www.rawpixel.com/image/12291830/photo-image-person-public-domain-manFree Image from public domain license