190206-N-ZW825-0307 AXINIM, Brazil (Feb. 6, 2019) U.S. Navy Lt. John Sullivan and Brazilian navy Lt. Gilvan Martins perform an ultrasound examination during a visit to the Heraclio Emiliano Moda medical clinic in Axinim, Brazil, Feb. 6, 2019. The visit marks the first stop of a month-long mission by four U.S. Navy physicians and their Brazilian navy counterparts aboard Brazilian navy Oswaldo Cruz-class hospital ship NAsH Carlos Chagas (U 19) to exchange medical expertise and to bring medical care to isolated communities along the Amazon River. (U.S. Navy photo by Mass Communication Specialist 1st Class Byron C. Linder/Released)