Military Working Dog Arko, assigned to the U.S. Air Force 96th Security Forces Squadron, captures the simulated bad guy… https://www.rawpixel.com/image/3319200/free-photo-image-german-33rd-53rdFree Image from public domain licenseA simulated wounded 6th Ranger Training Battalion Soldier yells for help while lying in the river during a mass casualty… https://www.rawpixel.com/image/8739412/photo-image-public-domain-person-natureFree Image from public domain licenseA U.S. Army Ranger fire team prepares to enter a building during a demonstration at the 6th Ranger Training Battalion’s open… https://www.rawpixel.com/image/8741366/photo-image-fire-public-domain-personFree Image from public domain license