dissidents Pope meets Fidel Castro, warns against ideology on Cuba trip Pope Francis met Cuba's revolutionary leader Fidel Castro on Sunday hours after warning Cubans to be... Sep 20, 2015 08:58 PM EDT Dissident artist Ai Weiwei brings exhibit to Alcatraz One of China's most famous dissidents has appropriated the United States' most famous former prison ... Sep 26, 2014 04:13 AM EDT