190819-M-OP674-019 RIO DE JANEIRO (Aug. 19, 2019) Military members from Latin American partner nations stand in formation during the opening ceremony of UNITAS LX on Naval Base Rio de Janeiro at Ilha Mocangue Grande, Brazil, Aug. 19, 2019. UNITAS is the world's longest-running, annual exercise and brings together multinational forces from 11 countries to include Brazil, Colombia, Peru, Chile, Argentina, Ecuador, Panama, Paraguay, Mexico, Great Britain and the United States. The exercise focuses in strengthening the existing regional partnerships and encourages establishing new relationships through the exchange of maritime mission-focused knowledge and expertise during multinational training operations. (U.S. Marine Corps photo by Cpl. Amy Phan/Released)