A U.S. Air Force military working dog watches the crowd during a tour of the K-9 kennels prior to the Military Working Dog Stamp ceremony Aug. 15, 2019, at Joint Base San Antonio-Medina Annex, Texas. The stamp honors dogs who have served in the U.S. armed forces since the U.S. Army created the War Dog Program K-9 Corps and began training man’s best friend in March 1942. (U.S. Air Force photo by Sarayuth Pinthong)