Sandbags protect a shop window at Selfridges in London, during the first Christmas of World War II, 16th December 1939. (Photo by Hudson/Topical Press Agency/Hulton Archive/Getty Images)
Sandbags protect a shop window at Selfridges in London, during the first Christmas of World War II, 16th December 1939. (Photo by Hudson/Topical Press Agency/Hulton Archive/Getty Images)