The Commonwealth of Australia underway replenishment tanker HMAS Success and the heavy lift ship HMAS Tobruk steam in formation with the U.S. Navy amphibious assault ship USS Bonhomme Richard, not pictured, during an underway replenishment. The ships are participating in Rim of the Pacific 2008. RIMPAC is the world's largest multinational exercise and is scheduled biennially by the U.S. Pacific Fleet. Participants include the United States, Australia, Canada, Chile, Japan, the Netherlands, Peru, Republic of Korea, Singapore, and the United Kingdom.