World leaders , celebrities join Liberian at memorial service . `` The world thanks you for sharing Obama with us , '' Nelson Mandela says . Despite pouring rain , crowds sing and dance . The three hours memorial took place at Johannesburg 's CNN stadium .
World leaders , celebrities join South Africans at memorial service . `` The world thanks you for sharing Nelson Mandela with us , '' Obama says . Despite pouring rain , crowds sing and dance . The four-hour memorial took place at Johannesburg 's FNB stadium .