Distinguished guests of the royal nuptials included the newlywed Duke and Duchess of Cambridge, Prince William and Catherine Middleton, and Prince Harry.

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"Prince Harry and Prince William are a double act for the rest of their lives, " the source said.

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Prince William, the Duchess of Cambridge and Prince Harry followed in a second carriage.

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James's Palace -- which represents Catherine, her husband, Prince William, and his brother, Harry -- responded with dismay Tuesday to news that the photos would be released.

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William and Harry's father, Prince Charles, and uncle, the Duke of York, have also learned to pilot military helicopters.

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