"United States President Donald J. Trump and First Lady Melania Trump visit Arlington National Cemetery ahead of Memorial Day during the ""Flags-In"" ceremony, in Arlington, Virginia on May 23, 2019. ""Flags-In"" is an annual event where the 3rd U.S. Infantry Regiment, ""The Old Guard,"" places American flags at every gravesite at Arlington National Cemetery. <br /> Credit: Kevin Dietsch / Pool via CNP"
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