A candle remains lit on top of a grave marker of an unknown German soldier before a German National Day of Mourning observance ceremony at the Kolmeshöhe Military Cemetery in Bitburg, Germany, Nov. 13, 2016. The day, known as Volkstrauertag in German, observes the human cost of warfare and suffering.
U.S. Air Force photo by Staff Sgt. Joe W. McFadden
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