U.S. Marines with 31st Marine Expeditionary Unit look

U.S. Marines with 31st Marine Expeditionary Unit look at a python (left) and a saltwater crocodile (right) at the Rockhampton Zoo before the start of Exercise Talisman Sabre 2011 in Rockhampton, Queensland, Australia, July 8, 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.