Nelson Mandela, President of the African National Congress, adjusts his party's flags before the start of his press conference on Tuesday, May 4, 1993 in London hotel. Mandela, in Britain as the guest of the Britis...Nelson Mandela, President of the African National Congress, adjusts his party's flags before the start of his press conference on Tuesday, May 4, 1993 in London hotel. Mandela, in Britain as the guest of the British government, said the greatest threat to peace in South Africa is from white rightwing extremists. (AP Photo/Denis Paquin)MORE LESS