Mandela legacy: "Invictus" author on the life of Nelson Mandela
John Carlin was the South Africa correspondent of The London Independent Newspaper when Nelson Mandela was freed from prison in 1990 and was the author of two books about his life, including the one on which the film "Invictus" was based. Carlin, author of "Knowing Mandela," joins "CBS This Morning: Saturday" to discuss the icon's legacy.