Video PlayerClose

Members of the King's Troop Royal Horse Artillery take part in 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 take part in 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)