Secretary Gates is briefed by a Marine Corps instructor. Secretary of Defense Robert M. Gates is briefed by a Marine Corps instructor while observing Marine recruits in training at the Edson Firing Range on Marine Corps Base Camp Pendleton, Calif., on Jan. 7, 2008. Camp Pendleton is the Corps' largest West Coast expeditionary training facility, encompassing more than 125,000 acres of Southern California terrain. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 971393-J-YFS06-507.jpg Photo Gallery