U.S. Defense Secretary Ash Carter speaks with U.S. Air Force Lt. Gen. Terrence O'Shaughnessy, right, commander of 7th Air Force and Air Component Command, U.S. Forces Korea/U.S. Combined Forces, and U.S. Army Col. James Minnich, Secretary of the United Nations Command Military Armistice Commission, as they depart the Demilitarized Zone, Republic of Korea, Nov. 1, 2015. Carter is visiting the Asia-Pacific region, where he will meet with leaders from more than a dozen nations to help advance the next phase of the U.S. military’s rebalance in the region by modernizing longtime alliances and building new partnerships. Photo by Air Force Senior Master Sgt. Adrian Cadiz