Former South African President Nelson Mandela speaks during the 46664 concert in his honour in Hyde Park, London June 27, 2008. The event was organized to raise funds for Nelson Mandela's HIV/AIDS "46664" campaign, named after his prison number. Exactly 46,664 people are expected to attend the event, which also celebrates the former South African president's 90th birthday on July 18. REUTERS/Andrew Winning (BRITAIN)