Personnel from the U.S. Marine Corps Forces Pacific Experimentation Center train service members from the armed forces of the Philippines’ National Development Support Command on the operation of the Aspen 2000DM water purification system during exercise Balikatan 2011, held from March to April, at Camp Aguinaldo, Quezon City, Philippines. - Personnel from the U.S. Marine Corps Forces Pacific Experimentation Center train service members from the armed forces of the Philippines’ National Development Support Command on the operation of the Aspen 2000DM water purification system during exercise Balikatan 2011, held from March to April, at Camp Aguinaldo, Quezon City, Philippines.