South Africa's "greatest son" and one of the most beloved leaders of the 20th century, Nelson Mandela, died Thursday at the age of 95. A sombre South African President Jacob Zuma announced Mandela's death in a television address. "Our nation has lost its greatest son. Our people have lost a father. Although we knew that this day would come, nothing can diminish our sense of a profound and enduring loss," Zuma said. "His tireless struggle for freedom earned him the respect of the world. His humility, his compassion and his humanity earned him their love." Zuma said he has ordered all flags in South Africa to be lowered to half-mast, where they will remain until after what will be a state funeral.