Fidel Castro Diaz-Balart, Fidel Castro's eldest son, speaks in the capital of South Africa in 2015

Cuban nuclear scientist and Fidel Castro's eldest son, Fidel Castro Diaz-Balart, spoke with South Africa's Minister of Science and Technology, Mosibudi Mangena, and addressed a symposium in Pretoria on Monday, July 21, 2015. There he discussed adv