150716-N-PZ-713-428 PHILIPPINE SEA Crew members on board the hospital ship USNS Mercy conduct a mass casualty drill during Pacific Partnership 2015. Medical personnel trained at various stations, focusing on skills for reception and initial treatment of a mass-casualty scenario. Mercy is en route to the Republic of Philippines for its third mission port during PP15. Pacific Partnership is in its 10th iteration and is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia-Pacific region. While training for crisis conditions, Pacific Partnership missions to date have provided real world medical care to approximately 270,000 patients and veterinary services to more than 38,000 animals. Additionally, the mission has provided critical infrastructure development to host nations through more than 180 engineering projects.