TEXT: U.S. Air Force Lt. Col. Otis Yeatts, 870th Air Expeditionary Squadron commander, shows Under Secretary of State for Arms Control and International Security Rose Gottemoeller, a view from one of the perimeter posts at Chebelley Airfield, Djibouti, Nov. 14, 2015. Gottemoeller toured Chebelley and Camp Lemonnier as part of her orientation to the U.S. presence in Africa.  As Under Secretary, Gottemoeller advises the Secretary of State on arms control, nonproliferation and disarmament.