Children of service members participate in physical training during Junior Jarhead Day aboard Marine Corps Air Station Miramar, Calif., June 6. Marine Aircraft Group (MAG) 16 Marines volunteered to lead four platoons of children to teach them what it's like to be a Marine. (U.S. Marine Corps photo by Lance Cpl. Kimberlyn D. Adams/Released) - Children of service members participate in physical training during Junior Jarhead Day aboard Marine Corps Air Station Miramar, Calif., June 6. Marine Aircraft Group (MAG) 16 Marines volunteered to lead four platoons of children to teach them what it's like to be a Marine. (U.S. Marine Corps photo by Lance Cpl. Kimberlyn D. Adams/Released)