FDR in South America; harbor, US cruiser Indianapolis, boats; ranked sailors wave; cruiser docks; CU cruiser; crowd; FD Roosevelt stands, hat over heart; CU at dinner with Pres. Getulio Vargas, FDR smokes cigarette without holder; speaks before Brazil's legislature of peace versus war, preparedness, intolerance toward aggression, stresses unity of Western Hemisphere nations, avoidance of war, words on soundtrack; FDR applauded; cruiser; FDR, officer wavefrom ship; photogs on ladder; CU FDR embraced by Uruguayan President Gabriel Terra; motorcade, parade; people run alongside car; FDR saluted by soldiers in Trinidad;