page_title: World Trade Center (1973–2001)
section_title: September 11 attacks
hierarchical_section_title: World Trade Center (1973–2001) / Terrorist attacks / September 11 attacks
caption_attribution_description: English: United Airlines Flight 175 crashes into the south tower of the World Trace Center complex in New York City during the September 11 attacks
context_page_description: The original World Trade Center was a complex of buildings in Lower Manhattan, New York, New York, United States which was destroyed in the September 11, 2001 attacks; a new complex is mostly complete and is built on the site of the old one.
  The biggest buildings in the original World Trade Center were the Twin Towers. The North Tower was the tallest building in the world when it was built. Taller ones were built later. The Twin Towers had 110 stories, and, at the time of its destruction, were the two tallest in New York. They and 7 World Trade Center were destroyed in the September 11, 2001 attacks and other buildings were damaged beyond repair.
  The original World Trade Center was designed by Minoru Yamasaki in the early 1960s using a tube-frame structural design for the twin 110-story towers. In gaining approval for the project, the Port Authority of New York and New Jersey agreed to take over the Hudson & Manhattan Railroad which became the Port Authority Trans-Hudson.
  Groundbreaking for the World Trade Center took place on August 5, 1966.
context_section_description: On September 11, 2001, Al-Qaeda terrorists hijacked American Airlines Flight 11 and crashed it into the 1 WTC, striking between the 93rd and 99th floors, killing 1,344 people. Seventeen minutes later, a second group crashed the hijacked United Airlines Flight 175 into the WTC, striking between the 77th and 85th floors, fewer than 700 were killed. At 5:20 p.m., 7 World Trade Center started to collapse with the crumble of the east penthouse. The Vista Hotel was destroyed during the collapse of the twin towers. The three remaining buildings in the WTC plaza were damaged by debris and later were demolished. Many conspiracy theories have appeared which say that certain people in the United States government knew about the attacks beforehand, or even made them happen.
caption: United Airlines Flight 175 crashes into the south tower, with the north tower already burning.
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