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Britain's Prince Charles and his wife Camilla, Duchess of Cornwall arrive at the Sydney Opera House after crossing Sydney Harbour on the Admiral's Barge on November 9, 2012. Britain's Prince Charles and his wife Camilla are in Australia on the second leg of a Diamond Jubilee Tour taking in Papua New Guinea, Australia and New Zealand. AFP PHOTO / POOL / Tim Wimborne (Photo credit should read TIM WIMBORNE/AFP/Getty Images)

Britain's Prince Charles and his wife Camilla, Duchess of Cornwall arrive at the Sydney Opera House after crossing Sydney Harbour on the Admiral's Barge on November 9, 2012. Britain's Prince Charles and his wife Camilla are in Australia on the second leg of a Diamond Jubilee Tour taking in Papua New Guinea, Australia and New Zealand. AFP PHOTO / POOL / Tim Wimborne        (Photo credit should read TIM WIMBORNE/AFP/Getty Images)