U.S. Marines with 2nd Battalion, 7th Marine Regiment,

U.S. Marines with 2nd Battalion, 7th Marine Regiment, the battalion landing team for 31st Marine Expeditionary Unit, arrive for exercise Talisman Sabre 2011 at Camp Rocky, Rockhampton, Australia, July 7, 2011. The alliance with Australia is one of the United States' most important defense relationships and a central pillar for national security strategy, based on shared values and a common commitment to peace and security.