leader, people who inspire people to follow them. that s exactly what he did for so many. people of all races, faiths, really paying tribute to any son mandela in these days. the area outside of mr. mandela s home in johannesburg as we have seen in the last few days become a real gather is place for mourners. there have been cheers, there have been tears and celebrations of his life but also of course, sadness, too. all for the icon who reshaped that country in many ways affected the world. christiane amanpour joins us from south africa. give us a global sense. we ve been talking about this in a personal way and people who are on the ground. but you have people from all over the world, more than 90 heads of state, ten former heads of state plantom travel to johannesburg for the services four u.s. presidents. give us a sense of the global