British photographer Terry O'Neil poses in front of his portrait of former South African president Nelson Mandela at a charity auction photocall at Sotheby's auction house in central London, on September 16, 2009.'Art for Africa' is organised by Africa Foundation and the September 21 Sale will benefit two charities which, fund and facilitate the care and support of orphaned and vulnerable children in South Africa. Getty Images logo Getty Images 29 months ago

British photographer Terry O'Neil poses in front of his portrait of former South African president Nelson Mandela at a charity auction photocall at Sotheby's auction house in central London, on September 16, 2009.'Art for Africa' is organised by Africa Foundation and the September 21 Sale will benefit two charities which, fund and facilitate the care and support of orphaned and vulnerable children in South Africa.