https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12267831Edit ImageSaveSaveEditCropCustom TextWashington, D.C. Sorting air mail at the main post office. 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 912 x 1200 px | 300 dpiLarge JPEG 2661 x 3500 px | 300 dpiBest Quality JPEG 10385 x 13658 px | 300 dpiTIFF 10385 x 13658 px | 300 dpi | 270.69 MBFree DownloadWashington, D.C. Sorting air mail at the main post office. Sourced from the Library of Congress.More