** FILE ** Cuba's Fidel Castro delivers a speech during the 50th anniversary of the Committee for the Defense of the Revolution on Sept. 28, 2010, in Havana. Mr. Castro said on Tuesday, March 22, 2011, that he resigned five years ago from all his official positions, including head of Cuba's Communist Party, a position he was thought still to hold. (AP Photo/Javier Galeano, File)
Fidel Castro (left) and his brother, Raul, have been the only two rulers Cuba has known since 1959. Raul, the current Cuban president, said Sunday that he will relinquish power by the end of his recently begun five-year term. The U.S. State Department met the news with a lukewarm reaction. (Associated Press)
Former Cuban leader Fidel Castro casts his ballot at a polling station during parliamentary elections in Havana on Sunday, Feb. 3, 2013. Castro, who appears in public only occasionally, was among more than 8 million islanders eligible to vote and approve 612 members of the National Assembly and more than 1,600 provincial delegates. (AP Photo/Ismael Francisco, Cubadebate)
Former Cuban leader Fidel Castro casts his ballot at a polling station during parliamentary elections in Havana on Sunday, Feb. 3, 2013. Castro, who appears in public only occasionally, was among more than 8 million islanders eligible to vote and approve 612 members of the National Assembly and more than 1,600 provincial delegates. (AP Photo/Ismael Francisco, Cubadebate)
Former Cuban leader Fidel Castro speaks during a meeting with intellectuals and writers at the International Book Fair in Havana on Sunday, Feb. 10, 2012. (AP Photo/Cubadebate, Roberto Chile)
This picture released by Cubadebate on its website early Monday, Oct. 22, 2012, shows Cuban leader Fidel Castro in Havana, Cuba, on Sunday, Oct. 21, 2012. Castro has written an article on Sunday in state-media criticizing those who spread rumors he was on his death bed. (AP Photo/Alex Castro, Cubadebate)
This picture released by Cubadebate on its website early Monday, Oct. 22, 2012, shows Cuban leader Fidel Castro in Havana, Cuba, on Sunday, Oct. 21, 2012. Castro has written an article on Sunday in state-media criticizing those who spread rumors he was on his death bed. (AP Photo/Alex Castro, Cubadebate)
Under a picture of Cuba's leader Fidel Castro, a Cuban schoolgirl raises her hand confirming a voter is casting his ballot properly during municipal elections in Havana Sunday Oct. 21, 2012. Cuban school children known as "pioneros" are in all polling stations during elections overseeing the process. A top executive of the Hotel Nacional told the AP Sunday 86-year-old Fidel Castro appeared in public for the first time in months at the hotel Saturday challenging persistent rumors that the aging revolutionary is near death. (AP Photo/Franklin Reyes)
Under pictures of Cuba's leader Fidel Castro, people cast their ballots at a polling station in Havana, Sunday Oct. 21, 2012. Cubans are going to the polls Sunday to vote in municipal elections. (AP Photo/Ismael Francisco/Cubadebate)
