150713-N-TW634-041 INDIAN OCEAN Marines approach a CH-53 Super Stallion assigned to the 31st Marine Expeditionary Unit on the flight deck of the amphibious transport dock ship USS Green Bay. Green Bay is in the Indian Ocean participating in Talisman Sabre 2015. Talisman Sabre is a bilateral exercise intended to train Australian and U.S. forces in planning and conducting combined task force operations.