** 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)
Arturo Martinez speaks at a meeting with labor union and Communist Party leaders on Cuba's economic problems at the steel mill Antillana de Acero in Havana. Major free-market reforms are in the works on the island nation. (Associated Press)
Chinese Vice President Xi Jinping, here in 2007, has been promoted to a key position in the Communist Party's military commission, indicating that he will succeed President Hu Jintao. (Associated Press)
A large campaign poster on Monday promotes a Workers' Party conference in Pyongyang, North Korea. It is said to be the largest such gathering of the ruling communist party in 30 years. (Associated Press)
