150713-N-TW634-152 INDIAN OCEAN Two CH-53 Super Stallions assigned to the 31st Marine Expeditionary Unit launch from 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.