190711-N-MX527-1048 CALLAO, Peru (July 11, 2019) Rear Adm. Donald Gabrielson, commander, U.S. Fourth Fleet, performs with the Fleet Forces Band, assigned to the ship USNS Comfort (T-AH 20) at a temporary medical treatment site. Comfort is working with health and government partners in Central America, South America, and the Caribbean to provide care on the ship and at land-based medical sites, helping to relieve pressure on national medical systems strained by an increase in Venezuelan migrants. (U.S. Navy photo by Mass Communication Specialist 3rd Class Brendan Fitzgerald)