The Chilean Navy Prat Class; Guided Missile Destroyer BLANCO ENCALADA (D 15) navigates through the Panama Canal on Aug., 21, 2006, while participating in the Panamax 2006 Exercise. Panamax 2006 is a multinational training exercise tailored to the defense of the Panama Canal, involving civil and military forces from the region. (U.S. Navy photo by Mass Communication SPECIALIST 2nd Class Christopher Perez) (Released)