Time Lapse: One World Trade Center's spire placed on roof

Time Lapse: One World Trade Center's spire placed on roof

Time Lapse: One World Trade Center's spire placed on roof

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Time Lapse: One World Trade Center's spire placed on roof

Time Lapse: One World Trade Center's spire placed on roof
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'Let us never fear to negotiate' -- Obama quoting Kennedy at Institute dedication

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'Let us never fear to negotiate' -- Obama quoting Kennedy at Institute dedication