Artist Rob Heard poses for photos with his installation "Shrouds of the Somme" at the Queen Elizabeth Olympic Park in London, Britain, on Nov. 7, 2018. "Shrouds of the Somme" is an art installation representing 72,396 British Commonwealth servicemen killed at the Battle of the Somme who have no known grave to mark 100 years since the end of the First World War. (Xinhua/Ray Tang)