U.S. Marine Corps Gen. James F. Amos, third from left, the commandant of the Marine Corps, watches British Royal Marines on an obstacle course at the Commando Training Center Royal Marines in Lympstone, Devon, England, June 6, 2012. Amos visited the facility to observe training practices. (U.S. Marine Corps photo by Sgt. Mallory S. VanderSchans/Released)