During the twenty-third world championship match for builders of free-flight model aircraft, which drew teams from thirty-seven countries including Canada, held at Göteborg, Sweden, in July 1971: shots of flags of various nations floating in the wind. Shots of contestants from various countries parading past the camera. Sequence on contestants registering their model airplanes for the competition. Sequence on contestants launching their entries, looking up. MLSs of a model aircraft in flight. The rest of the roll consists of similar activities.