<p>Memorial Hall is located in the WTC's old foundation<br/></p>
<p>Union workers, NYPD, and PAPD members stand next to the "Last Column" standing at Ground Zero<br/></p>
<p>Larry Silverstein<br/> </p>
<p>An old high speed elevator motor recovered from Ground Zero<br/></p>
<p>The steel facade of one of the old Twin Towers<br/></p>
<p>Obama greets Alson Crowther and Ling Young<br/></p>
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