Lt. Martha Claeysjacobson assigned to Navy Environmental and Preventive Medicine Unit Six (NEPMU-6) explain how a water filter system works to a People's Liberation Army Senior Medical Delegation Strategic Working Group. The PLA Senior Medical Delegation is visiting PACOM to discuss engagement between the US and PLA Navy hospital ships, medical institutional and educational exchanges and to enhance U.S. and People's Republic of China cooperation within the Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 1st Class Jay M. Chu/Released)