** 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)