Armed Forces of the Philippines Marine Staff Sgt. Arnold Navalta and Navy Seabee Builder Cleto Grimaldo discuss building techniques while constructing a new classroom as part of an engineer civil assistance project in support of Amphibious Landing Exercise 2013 (PHIBLEX 2013) at Dallipawen Elementary School, San Narciso, Zambales, Republic of the Philippines, Oct. 1, 2012. PHIBLEX 2013 is a bilateral training exercise conducted annually in the Republic of the Philippines to enhance amphibious readiness of both militaries and to strengthen interoperability.