150712-N-BX824-018 TIMOR SEA Lt. Shawn Tagan, the Ticonderoga-class guided missile cruiser USS Antietam's weapons department officer, and Lt. Nick Moskevich, Antietam's fire control officer, man the tactical actions officer station and force TAO station in the ship's command information center during an air defense exercise in support of Talisman Sabre 2015. TS 15 is a biennial exercise that provides an invaluable opportunity for nearly 30,000 U.S. and Australian Defence Forces to conduct operations in a combined, joint and interagency environment that will increase both countries' ability to plan and execute a full range of operations from combat missions to humanitarian assistance efforts.