Fidel Castro, left, and Cuba's President Raul Castro attend the 6th Communist Party Congress in Havana, Cuba, Tuesday April 19, 2011. Raul was named first secretary of Cuba's Communist Party at that session, with Fidel not included in the leadership for the first time since the party's creation 46 years ago. JAVIER GALEANO / ASSOCIATED PRESS

Cuba's President Raul Castro, left, and Iran's President Mahmoud Ahmadinejad review the honor guard at Revolution Palace in Havana, Cuba, Wednesday Jan. 11, 2012. Ahmadinejad went to Cuba as the third stop of a Latin American tour that included Venezuela, Nicaragua and Ecuador. ISMAEL FRANCISCO / ASSOCIATED PRESS