A Panamanian diver attached to Servicio Nacional Aero-Naval (SENAN) jumps into the water at the Vasco Nunez de Balboa naval base pier for its first familiarization dive with U.S., Canadian and Belizean divers as part of the multinational exercise PANAMAX 2011. PANAMAX 2011 is an annual multinational training exercise sponsored by U.S. Southern Command focusing on the security of the Panama Canal. Involving 16 nations from the Western Hemisphere and more than 3,500 civil and military personnel, the 12-day exercise takes place off the coasts of Panama and the United States, including Fort Sam Houston, Texas, Miami, Naval Station Mayport, Fla., and Stennis, Miss., among others Aug. 15-26.