File photo of Former Cuban leader Fidel Castro looking on as Venezuela's President Hugo Chavez reads a document in Havana

 
File photo of Former Cuban leader Fidel Castro looking on as Venezuela
Former Cuban leader Fidel Castro (L) looks on as Venezuela's President Hugo Chavez reads a document in Havana in this July 3, 2011 file handout photo. REUTERS/Revolution Studios/Cubadebate/Handout/Files