Observing Training Marine Corps Lance Cpl. Braxton Rico, left, watches as Uurzua, a military working dog, performs a nonbiting evolution technique on Lance Cpl. John Sandherr at Duboce Park during Fleet Week San Francisco, Oct. 6, 2017. Rico and Sandherr are assigned to 1st Marine Expeditionary Force. Navy photo by Seaman Natalie Byers SHARE: Download: Full Size (1.45 MB) Tags: Marines, military working dogs, Northern Command, training, Marine Corps Credit: Seaman Natalie Byers VIRIN: 171007-N-ZZ513-184A.JPG Photo Gallery