Dolphins swim in front of the Royal Australian Navy commercial tanker HMAS Sirius (O 266) during a replenishment-at-sea with the U.S. Navy Ticonderoga-class guided-missile cruiser USS Antietam (CG 54) during Talisman Saber 2013. Talisman Saber is a biennial training activity aimed at improving the combat readiness and interoperability of Australian and U.S. forces. (U.S. Navy photo by Mass Communication Specialist 3rd Class Declan Barnes/Released)