Up Above the WorldOn the terrace of an eloborate hilltop apartment overlooking a Central American capital, four people sit making polite conversation. The American couple an elderly physician and his young wife are tourists. Their host, whom they have just met, is a young man of striking good looks and charm. The girl, who is his mistress, is very young and very beautiful. Sitting there, with drinks in their hands, watching the sunset, the Slades seem to be