The African Union (AU) has named Nobel Peace Prize winners, leading sports personalities and musicians to lead a campaign for a conflict-free Africa, which is expected to climax on 21 September. Former South African President Fredrick de Klerk, Archbishop Desmond Tutu of Sou th Africa and wife of South African former President Nelson Mandela, Graca Machel, are among 12 key personalities selected to an advisory board to lead the campaign.