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Britain's Prince William and his wife Kate, Duchess of Cambridge pass through Horse Guards Parade, enroute to Buckingham Palace following their marriage at Westminster Abbey in London, Friday, April 29, 2011. (AP Photo/Sang Tan, Pool)

Britain's Prince William and his wife Kate, Duchess of Cambridge pass through Horse Guards Parade, enroute to Buckingham Palace following their marriage at Westminster Abbey in London, Friday, April 29, 2011.