Philippine Marine Corps Staff Sgt. Calixton Deatras, center, an armory noncommissioned officer with the Force Reconnaissance Battalion, prepares a bamboo stem while giving a demonstration to U.S. Marines assigned to the 3rd Law Enforcement Battalion and Combat Logistics Regiment 35 during a jungle environmental survival training course in Zambales province, Philippines, April 10, 2013, as part of exercise Balikatan 2013. Balikatan is an annual bilateral training exercise designed to increase interoperability between the Armed Forces of the Philippines and the U.S. military when responding to future natural disasters. (DoD photo by Lance Cpl. Brandon C. Suhr, U.S. Marine Corps/Released)