190214-N-ZW825-0289 CALAMA, Brazil (Feb. 14, 2019) Lt. Cmdr. Robert Lennon and Brazilian Navy 1st Lt. Gilvan Martins examine a patient at the Benjamin Silva-Calama clinic in Calama, Brazil, Feb. 14. The visit marks the third 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)