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A man stands in front of tombstones during a wreath-laying ceremony of Wreaths Across America Day at Arlington National Cemetery in Arlington, Virginia, the United States, on Dec. 15, 2018. (Xinhua/Liu Jie)
A man stands in front of tombstones during a wreath-laying ceremony of Wreaths Across America Day at Arlington National Cemetery in Arlington, Virginia, the United States, on Dec. 15, 2018. (Xinhua/Liu Jie)