The World Trade Center site (ZIP code: 10048), also known as "Ground Zero" after the September 11 attacks, sits on 16 acres (65,000 m2) in Lower Manhattan in New York City. The World Trade Center complex stood on the site until it was destroyed in the attacks; Studio Daniel Libeskind, the Port Authority of New York and New Jersey, Silverstein Properties, and the Lower Manhattan Development Corporation oversee the reconstruction of the site. The site is bounded by Vesey Street to the north, the West Side Highway to the west, Liberty Street to the south, and Church Street to the east. The Port Authority owns the site's land (except for 7 World Trade Center). Developer Larry Silverstein holds the lease to retail and office space in four of the site's buildings.

Soon after the September 11 attacks, Mayor Rudy Giuliani, Governor George Pataki, and President George W. Bush vowed to rebuild the World Trade Center site. On the day of the attacks, Giuliani proclaimed, "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again." During a visit to the site on September 14, 2001, Bush spoke to a crowd of cleanup workers through a bullhorn. An individual in the crowd shouted, "I can't hear you," to which Bush replied, "I can hear you. The rest of the world hears you. And the people who knocked these buildings down will hear all of us soon."

In a later address before Congress, the president declared, "As a symbol of America's resolve, my administration will work with Congress, and these two leaders, to show the world that we will rebuild New York City." The immediate response from World Trade Center leaseholder Larry Silverstein was that "it would be the tragedy of tragedies not to rebuild this part of New York. It would give the terrorists the victory they seek"

One World Trade Center, also known by its nickname and former name Freedom Tower, is the main building of the new World Trade Center under construction, expected to be completed in 2013, in Lower Manhattan in New York City, USA. The tower will be located in the northwest corner of the 16-acre (65,000 m²) World Trade Center site bounded by Vesey, West, Washington and Fulton streets.

Construction on below-ground utility relocations, footings, and foundations for the 1,776 feet (541.32 m) building began on April 27, 2006.[9] On December 19, 2006, the first steel columns were installed in the building's foundation. On March 30, 2009, the Port Authority said that the building will be known as 'One World Trade Center,' replacing its former name 'Freedom Tower.' When completed, One World Trade Center will be among the tallest buildings in the world and the tallest in the United States

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