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<p>January 9, 2010: President Nixon’s daughter, Tricia Nixon Cox lays a wreath given to her by President Obama at the gravesite of her father. She is escorted by Rear Admiral Mike Shatynsky and Commander Everett Alvarez, Jr., among the longest serving POWs in Vietnam. The ceremony included a Navy cadet color guard and the performance of “God Bless America” by Robbie Britt.</p>