Safe Dog Military working dog Freddy tries on a helmet during a training exercise at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Feb. 7, 2019. SHARE IMAGE: Download Image: Full Size (3.25 MB) Tags: Marine Corps, Training, Military Working Dog Photo By: Marine Corps Pfc. Skylar M. Harris VIRIN: 190207-M-ZZ999-144C.JPG Photo Gallery