https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12337009Edit ImageSaveSaveEditCropCustom TextChicago, Illinois. Mr. Trout, chief tower man at the south interlocking tower at 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 1159 x 1200 px | 300 dpiLarge JPEG 3379 x 3500 px | 300 dpiBest Quality JPEG 4932 x 5108 px | 300 dpiTIFF 4932 x 5108 px | 300 dpi | 48.05 MBFree DownloadChicago, Illinois. Mr. Trout, chief tower man at the south interlocking tower at Union Station. Sourced from the Library of Congress.More