PHOTOS: New York City and 9/11 - 2001 vs 2011

<div class="meta image-caption"><div class="origin-logo origin-image none"><span>none</span></div><span class="caption-text">(Top) The south tower starts to collapse as smoke billows from both buildings of the World Trade Center in New York. (Below) One World Trade Center rises in 2011. (AP Photo/ Jim Collins)</span></div>
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