https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12337091Edit ImageSaveSaveEditCropCustom TextChicago, Illinois. Mr. Trout, chief tower man at the south interlocking tower at the Union 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 952 px | 300 dpiLarge JPEG 3500 x 2775 px | 300 dpiBest Quality JPEG 4096 x 3248 px | 300 dpiTIFF 4096 x 3248 px | 300 dpi | 12.69 MBFree DownloadChicago, Illinois. Mr. Trout, chief tower man at the south interlocking tower at the Union Station. Sourced from the Library of Congress.More