Guard ceremony, outside Buckingham Palace, in London. 衛兵儀式, 白金漢宮外

Changing the Guard ceremony outside Buckingham Palace in London
An armed police officer stands guard in the foreground as members of the British military march past, during the Changing the Guard ceremony outside Buckingham Palace in London, Wednesday, Dec. 21, 2016. London police on Wednesday instituted road closures in the area surrounding Buckingham Palace for nearly two hours while the popular Changing the Guard military ceremony was taking place — a security measure rushed into place because of the deadly Christmas market truck attack in Berlin. (Photo: Matt Dunham/AP)
Photos of the day — December 21, 2016
https://www.yahoo.com/news/photos-day-december-21-2016-slideshow-wp-001038316/photo-p-armed-police-officer-stands-photo-001038321.html