Meghan Markle and Prince Harry marked Mandela Day by attending the 2020 UN Nelson Mandela Prize award ceremony in New York.The informal meeting was held by the General Assembly, and came just days after explosive claims were made about Meghan by journalist Tom Bower in his forthcoming book about the duchess and her relationship with the royal family, Revenge. But Meghan was not showing any sign of being upset or feeling vulnerable about the book's claims.