Maj. Lawrence Ngeryen of Rocklin, Calif., a staff dental officer at Travis Air Force Base, Calif., explains to a young patient the reason for wearing a protective visor while performing dental surgery at the Yukon-Kuskokwim Health Corporation clinic in Bethel, Alaska, March 9. Operation Arctic Care is a joint military medical readiness exercise that brings no-cost health care to underserved Alaskan residents, including dental, optometry and veterinary support. This year's Navy-led mission has teams in 11 villages in Alaska's Yukon-Kuskokwim Delta region. (U.S. Air Force photo/Senior Airman Christopher Griffin)