Brix, a retired U.S. Navy military working dog, poses for a final photo before undergoing euthanasia at the veterinary clinic at Scott Air Force Base, Ill., July 18, 2014. Brix was euthanized due to health issues. He earned the Navy and Marine Corps Achievement Medal and the Army Commendation Medal while deployed to Iraq. (U.S Air Force photo by Senior Airman Tristin English/Released)