Memorial Day at Arlington National Cemetery (19 images)

President Joe Biden, first lady Jill Biden, Vice President Kamala Harris and second gentleman Doug Emhoff attend a wreath-laying ceremony at the Tomb of the Unknown Soldier, and members of the Third U.S. Infantry Regiment place U.S. flags at Arlington National Cemetery in Arlington, Va., to mark Memorial Day 2021.

President Joe Biden speaks at the153rd national Memorial Day observance at Arlington National Cemetery in Arlington, Va., on Monday. Photo by Tasos Katopodis/UPI

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"We must never forget each of these markers -- both known and unknown here at Arlington and far beyond -- represent a precious life. A son, a daughter, a mother, father, brothers sisters, a friend a neighbor," President Joe Biden said. Photo by Tasos Katopodis/UPI

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President Joe Biden lays a wreath at the Tomb of the Unknown Solider. Photo by Tasos Katopodis/UPI

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President Joe Biden and first lady Jill Biden walk through section 12 at Arlington National Cemetery. Photo by Tasos Katopodis/UPI

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