English businessman Richard Branson, former secretary-general of the United Nations Kofi Annan, and former South African first lady and widow of Nelson Mandela Graca Michel and Granddaughter Ndileka Mandela walk during The Elders walk together for 100 Sparks of Hope to celebrate Nelson Mandela's 100th Anniversary at Constitution Hill in Johannesburg

(2ndL-R) English businessman Richard Branson, former secretary-general of the United Nations Kofi Annan, former South African first lady and widow of Nelson Mandela Graca Michel, grand-daughter Ndileka Mandela bishop Malusi Mpumlwana attend the walk together for 100 Sparks of Hope to celebrate Nelson Mandela's 100th Anniversary at Constitution Hill in Johannesburg

(L-R) English businessman Richard Branson, former secretary-general of the United Nations Kofi Annan, former South African first lady and widow of Nelson Mandela Graca Michel and grand-daughter Ndileka Mandela attend the walk together for 100 Sparks of Hope to celebrate Nelson Mandela's 100th Anniversary at Constitution Hill in Johannesburg

English businessman Richard Branson (L) rallies the crowd while former secretary-general of the United Nations Kofi Annan, former South African first lady and widow of Nelson Mandela Graca Michel, grand-daughter Ndileka Mandela bishop Malusi Mpumlwana walk during The Elders walk together for 100 Sparks of Hope to celebrate Nelson Mandela's 100th Anniversary at Constitution Hill in Johannesburg