ATF HQ on Instagram: "Happy National Dog Day! ATF K-9s are on the front lines investigating crimes, sniffing out explosives, hunting for suspects, and looking for clues. These hardworking pups are a critical part of ATF's mission and keeping communities safe. Learn more at https://www.atf.gov/explosives/enforcement-tools-services/explosives-detection-canines/canine-gallery. #ATFK9 #TacticalK9 #ExplosivesDetectionK9 #NationalDogDay"