This program is an epic story of engineering, innovation and the perseverance of the human spirit. With extraordinary access granted by The Port Authority of New York and New Jersey, "Rebuilding Ground Zero" follows the five-year construction of the Freedom Tower and the World Trade Center Memorial. NOVA captures the behind-the-scenes struggle of architects and engineers with the pressures of a tight schedule, the demands of practical office space and efficient, "green" architecture and the public's expectations of a fitting site for national remembrance. In September 2011, on the 10th anniversary of 9/11, this program will culminate with the topping off ceremony at the Freedom Tower and the opening of the memorial.