160928-N-AW702-001 PANAMA CITY, Panama (Sept. 28, 2016) Rear Adm. Sean Buck, Commander, U.S. Naval Forces Southern Command and Commander of U.S. 4th Fleet, speaks during a reception near the end of UNITAS 2016. Panama City, Panama. UNITAS is an annual multi-national exercise that focuses on strengthening our existing regional partnerships and encourages establishing new relationships through the exchange of maritime mission-focused knowledge and expertise throughout the exercise. (U.S. Navy Photo by Petty Officer1st Class Jacob Sippel/Released)