That year, Mandela, Machel and Desmond Tutu convened a group of world leaders in Johannesburg to contribute their wisdom and independent leadership to some of the world's toughest problems
Chaka chimenecho, Mandela, Machel ndi Desmond Tutu adasonkhanitsa gulu la atsogoleri adziko lonse ku Johannesburg kuti apereke nzeru zawo ndi utsogoleri wodziyimira pawokha ku zovuta zina zapadziko lonse