Petty Officer 2nd Class Joseph Castillo, from the Combat Logistics Battalion Health Service Support Team of the 31st Marine Expeditionary Unit, dispenses medication during a medical civil action project at San Juan Elementary School in Ternate, Philippines. The 31st MEU is operating with the forward-deployed Essex Amphibious Ready Group as part of Balikatan 2010, an annual, bilateral exercise designed to improve interoperability between the U.S. and Republic of the Philippines.