https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12287620Edit ImageSaveSaveEditCropCustom TextFort Belvoir, Virginia. Sergeant George Camblair learning how to use a gas mask in a practice smokescreen. 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 1176 x 1200 px | 300 dpiLarge JPEG 3429 x 3500 px | 300 dpiBest Quality JPEG 4872 x 4973 px | 300 dpiTIFF 4872 x 4973 px | 300 dpi | 46.21 MBFree DownloadFort Belvoir, Virginia. Sergeant George Camblair learning how to use a gas mask in a practice smokescreen. Sourced from the Library of Congress.More