Conversation so far:
What was William Randolph Hearts first interested in?
William Randolph Hearst was particularly interested in the newly emerging technologies relating to aviation and had his first experience of flight in January 1910, in Los Angeles.

Question: Why were John and Jacqueline Kennedy at one of his homes?
Self-contained rewrite: Why were John and Jacqueline Kennedy at one of William Randolph Hearst's homes?