The first of two features Walt Disney made at the behest of the Office of Inter-American Affairs, Saludos Amigos consists of four cartoons linked by live-action travel footage. The very funny "Lake Titicaca" finds Donald Duck high in the Bolivian Andes, struggling with a recalcitrant llama. "Pedro," the story of a little airplane replacing his father on a mail run across the Andes, is a v…