Hemingway's grandsons set sail from Key West to Havana to boost warming US-Cuba ties
SHOWS: HAVANA, CUBA (MAY 22, 2015) (REUTERS - ACCESS ALL) 1. VARIOUS OF YACHT ARRIVING AT HEMINGWAY MARINA 2. CUBAN AND U.S. FLAGS 3. VARIOUS OF YACHT PULLING INTO HEMINGWAY MARINA 4. ERNEST
