150716-N-TW634-113 INDIAN OCEAN (June 16, 2015) The guided-missile destroyer USS Preble (DDG 88), left, and the amphibious dock landing ship USS Ashland (LSD 48) transit the Indian Ocean. Preble and Ashland are participating in Talisman Sabre 2015, a bilateral exercise intended to train Australian and U.S. forces in planning and conducting combined task force operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Derek A. Harkins/Released)