After the stunning terrorist attack September 11, 2001 considered the most powerful in the history of the States United that killed more than three thousand civilians from 92 different countries, the authorities in New York in August 2006 began the project inmortailizara memory of this event that changed the lives of thousands of people around the world highlighting the heroic efforts of firefighters and police officers who risked their lives to save the lives of those who were trapped and helpless in the bowels of building 100-story completely in flames. This project aims to encapsulate that moment precisely in the void left by those giant towers. Drawing on these tragic times there will be an exhibition at the museum in which reference to the consequences of this new way of war called “terrorism” and its consequences for daily life for millions of people around the world, all with the purpose of commemorating and strengthening the memorable struggle between freedom and intentions of individuals and nations to submit it using up methods most inhuman . The Memorial September 11th was designed by architect Michael Arad , the landscape architect Peter Walker , Davis Brody Bond and Snøhetta , this will consist of two voids located exactly in the physical traces left by the Twin Towers WTC original , with falls 915 meters discharging continuously a flow pristine of water to its side . Those promoting the project, reserved half the space in the estate to pay tribute to the victims and serve as a place of remembrance public of what happened in that morning blue of September 11 , around this area are to be erected new towers office , the entrance to the transport hub and a center performing arts . The completion of the towers office of the World Trade Center marked an important milestone in the redevelopment of downtown New York , offering more than 10 million square feet of office space. Along with the newly opened World Trade Center 7 north of the site and the establishment of World Headquarters Goldman Sachs in Battery Park City , west of the Twin Towers, the skyline will feature no fewer than seven new corporate offices towers, which total 14 million square feet of Class A office space. A landmark for the city of New York , with the number 1 World Trade Center ( WTC ) will trigger a symbolic tower 1,776-foot into the sky to become the tallest building in the United States. Designed by David M. Childs of Skidmore , Owings & Merrill ( SOM ) , the building of 2.6 million square feet including office space , a gazebo, restaurants and facilities of antennas. The World Trade Center 1 is located at the northwest corner of the WTC site . ame of the street is , 200 Greenwich Street, has a sparkling form and a summit of -shaped glass diamond that will create an addition to the skyline of New York. Designed by Foster + Partners, the tower 79- story will be the second tallest skyscraper in the World Trade Center ( WTC) and the city of New York. Located east of the center proposed performing arts and north of the Hub tranport , Tower 2 will rise to 1,270 feet and be topped by an antenna 80 feet. Tower 3, also known as 175 Greenwich Street, will be the third tallest building in the World Trade Center ( WTC) . Designed by Richard Rogers of Rogers Stirk Harbour Partners, the tower will be located in the center of the buildings that surround the monument. Also known as 150 Greenwich Street, will face directly to the World Trade Center ( WTC ) Memorial Park from the west. It has 975 feet high and 64 floors , designed by Maki and Associates and will have a discreet but dignified while also serve to encourage the environment immediate urban as part of efforts redevelopment in downtown New York. Located in the southern part of the Center World Trade (WTC ) Tower 5 will be developed by the Port Authority of New York and New Jersey. This building marks the entrance to the new World Trade Center and announced the spirit of reconstruction and renovation in downtown Manhattan. Opened in May 2006, rebuilt the 52 stories that originally owned the original building of the 1.7 million square feet in this building and two thirds have been leased , with a directory of tenants that include Silverstein Properties, Moody ‘s Corporation , West LB, Ameriprise Financial, ABN AMRO, and Mansueto Ventures who is editor of Fast Company Inc. The building is owned by Silverstein Properties and was designed by David Childs of Skidmore , Owings and Merrill ( SOM ) in conjunction with the artist and designer James Carpenter .