170427-M-EL431-0142 OCEANSIDE, Calif. (April 27, 2017) Vice Adm. Thomas S. Rowden, commander, Naval Surface Forces, Lt. Gen. Robert S. Walsh, commanding general of Marine Corps Combat Development Command, Sean J. Stackley, acting secretary of the Navy, and Commandant of the Marine Corps Gen. Robert B. Neller, speak during the Advanced Naval Technology Exercise at Marine Corps Base Camp Pendleton, Calif. (U.S. Marine Corps photo by Cpl. Samantha K. Braun/Released)