Feliciano stands at the gravesite of his wife, Rosa. "She's buried here," he says. "So Green-Wood Cemetery is ground zero for me." Courtesy of Isaac Feliciano hide caption

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At A Brooklyn Cemetery, A Place Of Work — And An Enduring Memorial
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Family members of victims of the Sept. 11 attacks demonstrate against the decision to transfer the unidentified remains to a repository at the World Trade Center site. Eric Thayer /Reuters /Landov hide caption

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Paul Simon singing 'The Sound of Silence'
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President Obama pauses after laying a wreath at the National Sept. 11 Memorial at Ground Zero in New York, Thursday, May 5, 2011. Charles Dharapak/AP hide caption

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