U.S. Navy Adm. Samuel J. Locklear, rear, the commander of U.S. Pacific Command, walks with U.S. Marine Corps Lt. Col. Matthew Puglisi, the officer in charge of Marine Rotational Force-Darwin, while visiting Robertson Barracks in Northern Territory, Australia, April 16, 2014. Locklear toured the barracks and Royal Australian Air Force Base Darwin and met with Marines assigned to the rotational force.