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Members of the King's Troop Royal Horse Artillery fire a gun salute to mark Queen Elizabeth II's 67th anniversary of her accession to the throne at Green Park in London, Britain, on Feb. 6, 2019. (Xinhua/Ray Tang)
Members of the King's Troop Royal Horse Artillery fire a gun salute to mark Queen Elizabeth II's 67th anniversary of her accession to the throne at Green Park in London, Britain, on Feb. 6, 2019. (Xinhua/Ray Tang)