Ramon Castro, a lifelong rancher and farmer who bore a strong physical resemblance to younger brother Fidel Castro, has died, Cuban state media announced Tuesday. He was 91. Widely known by his nickname "Mongo," the white-bearded Ramon Castro preferred tending crops and livestock to the revolutionary political life embraced by his younger siblings Fidel and Raul, who replaced Fidel as Cuba's president in February 2008. Two years older than Fidel, Ramon was long used to getting double-takes from people who insisted he looked just like his famous brother. At times, Ramon was said to reply that because he was older,...