Nelson Mandela : a man who changed the world.

A special edition of "World News with Diane Sawyer" titled "Nelson Mandela: A Man Who Changed the World" reflecting on the life of the former South African President who died December 5, 2013. Corespondent Robin Roberts provides the biography and talks about her visit to South Africa. Alex Marquardt reports on reaction to the death in South Africa. Byron Pitts reports on Mandela's visit to the U.S. David Muir talks with one of Mandela's jailers about their unlikely friendship. George Stephanopoulos describes Mandela's character. Terry Moran reports on reaction around the world. Mandela's second wife Graça Machel, talks about her husband's life. The special features Mandela's achievement with the Rugby World Cup portrayed in the movie "Invictus" and highlights letters Mandela wrote from prison to his family which are read by Razia Saleh. Jim Avila describes the reactions found on social media sites. It ends with excerpts from several of Mandela's speeches. Reporter Clayton Sandell in Denver reports on a major storm system cutting across the U.S. heartland.

Broadcast on ABC News, Dec. 5, 2013.