Remembering 9/11: The Evolution of Ground Zero

The Evolution of the 9/11 Memorial Service
Seth Wenig / AP

Sept. 7, 2010
In the past year, great progress toward building a permanent memorial has been made. The outline of the tower footprint is clearly visible. Waterfalls will course down the side walls and then into the square in the middle — a symbol of the void created when the towers fell — when the project is complete.

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