U.S. Marines and sailors with 31st Marine Expeditionary Unit have multiple displays showing different types of gear and weapons during Exercise Talisman Sabre 2011's opening ceremony at the Rockhampton Fairgrounds, Queensland, Australia, July 9, 2011. Talisman Sabre promotes the alliance with Australia, which is one 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.