4 World Trade developers hold tour of progress

Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year
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One World Trade Center is viewed from the 72nd floor of Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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Construction workers work on the 72nd floor at Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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Construction workers are viewed from the 72nd floor at Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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A construction worker is viewed from the 72nd floor at Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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The reflective pool at The National September 11 Memorial Museum is viewed on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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One World Trade Center is viewed from the 72nd floor of Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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A construction worker is viewed from the 72nd floor at Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)
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New York City is reflected in a window of Four World Trade Center on September 7, 2012 in New York City. As New York City and the country prepare for the 11th anniversary of the September 11, 2001 terrorist attacks, work proceeds at the former site of the World Trade Center Towers. The 16-acre site, which is owned by the Port Authority of New York and New Jersey and is being rebuilt with developer Larry Silverstein, has a projected price tag of $14.8 billion. Of the four office towers planned for the site, two have had finishing beams placed on their top floors and the above-ground memorial was completed in time for the 10th anniversary last year. (Getty Images)