In Cuba, the eldest son of Fidel Castro committed suicide on Thursday, following a long struggle with depression. Fidel Castro Díaz-Balart, who was known affectionately as “Fidelito” or “Little Fidel” for his resemblance to his father, was 68 years old. Castro Díaz-Balart was a nuclear physicist who studied in the former Soviet Union. He was also a relative of some of the most strident anti-Castro Cuban exiles living in the United States and cousin of Congressmember Mario Díaz-Balart and former Congressmember Lincoln Díaz-Balart—both Republicans from Florida.