https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290946Edit ImageSaveSaveEditCropCustom TextChicago, Illinois. Loading mail bags into cars at the Union Station. The largest volume in Chicago passes through this station. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 886 px | 300 dpiLarge JPEG 1536 x 1134 px | 300 dpiTIFF 1536 x 1134 px | 300 dpi | 1.66 MBFree DownloadChicago, Illinois. Loading mail bags into cars at the Union Station. The largest volume in Chicago passes through this station. Sourced from the Library of Congress.More