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Fidel Castro Jr. signs an autograph for a child at a meeting with Nobel Prize Physicist Jores Alferov in St. Petersburg, 05 October 2007. Castro spoke to a group of elementary and university students at the request of Alferov. AFP PHOTO / SERGEY KULIKOV (Photo credit should read SERGEY KULIKOV/AFP/Getty Images)

Fidel Castro Jr. signs an autograph for a child at a meeting with Nobel Prize Physicist Jores Alferov in St. Petersburg, 05 October 2007. Castro spoke to a group of elementary and university students at the request of Alferov.      AFP  PHOTO / SERGEY KULIKOV (Photo credit should read SERGEY KULIKOV/AFP/Getty Images)