https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/434298![Black freight train on the railroad running across the United States. Original image from Carol M. Highsmith's America…](https://images.rawpixel.com/image_social_landscape/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGQxOS0zLTMyMDY4dS5qcGc.jpg)
![Black freight train on the railroad running across the United States. Original image from Carol M. Highsmith's America…](https://images.rawpixel.com/image_social_landscape/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvcGQxOS0zLTMyMDY4dS5qcGc.jpg)
Black freight train on the railroad running across the United States. Original image from Carol M. Highsmith's America, Library of Congress collection. Digitally enhanced by rawpixel.
Black freight train on the railroad running across the United States. Original image from Carol M. Highsmith's America, Library of Congress collection. Digitally enhanced by rawpixel.
Public DomainFree CC0 image for Personal and Business use