Chief of Naval Operations, Adm. John M. Richardson, observes an exercise at Military Operations on Urbanized Terrain town, Marine Corps Air Ground Combat Center Twentynine Palms, Calif., May 25, 2016. Commandant of the Marine Corps, Gen. Robert B. Neller, invited the CNO to observe the training to gain a better appreciation of naval integration during operations ashore. (U.S. Marine Corps photo by Staff Sgt. Gabriela Garcia/Released)