• Security guards stand inside One World Trade Center. Officials say the building is currently at 60 per cent occupancy, with Conde Nast as one of the first major tenants to move in. Andrew Burton / Getty Images / AFP
    Security guards stand inside One World Trade Center. Officials say the building is currently at 60 per cent occupancy, with Conde Nast as one of the first major tenants to move in. Andrew Burton / Getty Images / AFP
  • The elevator bank of One World Trade Center, which opened for business yesterday. Andrew Burton / Getty Images / AFP
    The elevator bank of One World Trade Center, which opened for business yesterday. Andrew Burton / Getty Images / AFP
  • One World Trade Center, centre, stands between the transportation hub, left, still under construction, and 7 World Trade Center, second from right. Mark Lennihan / AP Photo
    One World Trade Center, centre, stands between the transportation hub, left, still under construction, and 7 World Trade Center, second from right. Mark Lennihan / AP Photo
  • People walk past One World Trade Center. It is America's tallest building. Mark Lennihan / AP Photo
    People walk past One World Trade Center. It is America's tallest building. Mark Lennihan / AP Photo
  • A street level view of the One World Trade Center tower. Mike Segar / Reuters
    A street level view of the One World Trade Center tower. Mike Segar / Reuters
  • Employees work in the lobby of the One World Trade Center. Mike Segar / Reuters
    Employees work in the lobby of the One World Trade Center. Mike Segar / Reuters
  • The view from the 63rd floor of One World Trade Center. The tower is 1,776 feet, but 1,368 without its spire making it shorter than the Willis Tower in Chicago. Andrew Burton / Getty Images / AFP
    The view from the 63rd floor of One World Trade Center. The tower is 1,776 feet, but 1,368 without its spire making it shorter than the Willis Tower in Chicago. Andrew Burton / Getty Images / AFP
  • A street level view of the One World Trade Center tower in New York, November 3, 2014. The 104-story skyscraper built after 9/11 was known as the Freedom Tower but is now simply called One World Trade Center. High strength concrete - seven times the standard - has been used to build the tower Mike Segar / Reuters
    A street level view of the One World Trade Center tower in New York, November 3, 2014. The 104-story skyscraper built after 9/11 was known as the Freedom Tower but is now simply called One World Trade Center. High strength concrete - seven times the standard - has been used to build the tower Mike Segar / Reuters
  • Members of the media look north at the Manhattan skyline from the 64th floor of the One World Trade Center. Below the tower will be 55,000 square feet of retail space and connections to 11 subways and trains. Mike Segar / Reuters
    Members of the media look north at the Manhattan skyline from the 64th floor of the One World Trade Center. Below the tower will be 55,000 square feet of retail space and connections to 11 subways and trains. Mike Segar / Reuters
  • Members of the media explore a model office, used to exhibit what a business space could look like on the 63rd floor of One World Trade Center. Andrew Burton /Getty Images / AFP
    Members of the media explore a model office, used to exhibit what a business space could look like on the 63rd floor of One World Trade Center. Andrew Burton /Getty Images / AFP
  • Employees work in the lobby of the One World Trade Center. Mike Segar / Reuters
    Employees work in the lobby of the One World Trade Center. Mike Segar / Reuters
  • A security guard stands inside One World Trade Center. Construction of the building started in 2006. Andrew Burton / Getty Images / AFP
    A security guard stands inside One World Trade Center. Construction of the building started in 2006. Andrew Burton / Getty Images / AFP
  • A man checks in to the front desk. The building is the third tallest in the world. Andrew Burton / Getty Images / AFP
    A man checks in to the front desk. The building is the third tallest in the world. Andrew Burton / Getty Images / AFP

One World Trade Center in New York officially opens - in pictures


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Thirteen years after the 9/11 terrorist attack, the resurrected World Trade Center is again opening for business, marking an emotional milestone for both New Yorkers and the United States as a whole.