** FILE ** In this file photo from July 26, 2012, Raul Castro speaks in Guantanamo on Revolution Day, the anniversary of the July 26, 1953, rebel attack on a military barracks led by Fidel and Raul Castro that is considered the beginning of the Cuban revolution. (Associated Press)

** FILE ** In this file photo from July 26, 2012, Raul Castro speaks in Guantanamo on Revolution Day, the anniversary of the July 26, 1953, rebel attack on a military barracks led by Fidel and Raul Castro that is considered the beginning of the Cuban revolution. (Associated Press)