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LONDON, UNITED KINGDOM - JULY 12: Nelson Mandela In Brixton, London At The End Of His State Visit To Britain (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - JULY 12:  Nelson Mandela In Brixton, London At The End  Of His State Visit To Britain  (Photo by Tim Graham/Getty Images)

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LONDON, UNITED KINGDOM - JULY 12: Nelson Mandela Waving To The Crowds In London At The End Of His State Visit To Britain (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - JULY 12:  Nelson Mandela Waving To The Crowds In London At The End Of His State Visit To Britain  (Photo by Tim Graham/Getty Images)

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LONDON, UNITED KINGDOM - JULY 12: President Nelson Mandela In Brixton Market London (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - JULY 12:  President Nelson Mandela In Brixton Market London  (Photo by Tim Graham/Getty Images)

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LONDON, UNITED KINGDOM - JULY 12: Nelson Mandela And Prince Andrew In Trafalgar Square, London At The End Of Mandela's State Visit To Britain (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - JULY 12:  Nelson Mandela And Prince Andrew In Trafalgar Square, London At The End Of Mandela's State Visit To Britain  (Photo by Tim Graham/Getty Images)

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LONDON, UNITED KINGDOM - JULY 12: Prince Charles And President Nelson Mandela In Brixton.immediately Behind Charles Is His Police Bodyguard Tony Parker (Photo by Tim Graham/Getty Images)

LONDON, UNITED KINGDOM - JULY 12:  Prince Charles And President Nelson Mandela In Brixton.immediately Behind Charles Is His Police Bodyguard Tony Parker  (Photo by Tim Graham/Getty Images)