A dentist performs a root canal.
VINH, Vietnam (July 17, 2012) Erick Sato, left, a dentist, and Natalie Chien, a University of California Pre-Dental Society student, perform a root canal on a Vietnamese patient aboard the Military Sealift Command hospital ship USNS Mercy (T-AH 19). Mercy is anchored off the coast of Vinh, Vietnam for Pacific Partnership 2012. Now in its seventh year, Pacific Partnership is an annual U.S. Pacific Fleet humanitarian and civic assistance mission U.S. military, host and partner nations, non-governmental organizations and international agencies designed to build stronger relationships and disaster response capabilities in the Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 3rd Class Laurie Dexter/Released)
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