JOHANNESBURG, SOUTH AFRICA - DECEMBER 03:  Prince Harry gives a speech at the Nelson Mandela Foundation Centre of Memory on December 3, 2015 in Johannesburg, South Africa.  Prince Harry is visiting South Africa as part of a Royal Tour that has included the Opening of a new Charity Centre for children in Lesotho (Sentebale's Mamohato Children's Centre) and includes stops in Durban, Cape Town, Kruger National Park and Johannesburg.  (Photo by Chris Jackson/Getty Images)