North Tower
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| North Tower | |
|---|---|
| Name | North Tower |
| Status | Destroyed |
| Location | Lower Manhattan, New York City, New York (state) |
| Start date | 1966 |
| Completion date | 1972 |
| Demolished | September 11, 2001 |
| Height | 1,368 ft (417 m) |
| Floors | 110 |
| Architects | Minoru Yamasaki, Emery Roth & Sons |
| Structural engineer | Leslie E. Robertson Associates |
| Developer | Port Authority of New York and New Jersey |
| Owner | Port Authority of New York and New Jersey |
| Material | Steel, concrete, aluminum, glass |
North Tower The North Tower was one of two landmark skyscrapers comprising the original World Trade Center complex in Lower Manhattan, New York City. Standing at 1,368 feet with 110 stories, it served as a hub for international finance, housing tenants from Cantor Fitzgerald, Marsh & McLennan Companies, and Bankers Trust among others, and featured the famed Windows on the World restaurant complex and the World Trade Center PATH station. The building became globally prominent following its destruction in the terrorist attacks on September 11, 2001, when it was struck by a hijacked airliner and subsequently collapsed.
Overview
The North Tower, officially 1 World Trade Center under the original complex, was developed by the Port Authority of New York and New Jersey and designed principally by Minoru Yamasaki with the engineering firm Leslie E. Robertson Associates. As the taller of the pair, it hosted offices for financial firms such as Morgan Stanley tenants, insurance brokers like Aon Corporation, and trading firms including Cantor Fitzgerald. The tower incorporated mechanical floors, observation areas, and became an icon alongside structures like the Empire State Building and Chrysler Building, contributing to the skyline alongside Battery Park City and the Brooklyn Bridge.
History and Construction
Site selection and commissioning involved agreements between the Port Authority of New York and New Jersey and the City of New York in the 1960s as part of urban renewal initiatives associated with officials such as Robert Moses and planners from Skidmore, Owings & Merrill-era projects. Groundbreaking began in 1966 and construction continued through the early 1970s, with completion of the towers in 1972 and official dedication in 1973, attended by public figures linked to regional planning. The innovative lightweight steel tube-frame design by Leslie E. Robertson Associates and the curtain wall by contractors including Tishman Realty & Construction allowed rapid vertical progress, while controversies over displacement of local businesses and residents echoed debates involving groups like Project for Public Spaces and neighborhood advocates.
Throughout its operational life, 1 World Trade Center underwent tenant turnovers involving corporations such as Marsh & McLennan Companies, Bankers Trust, and Cantor Fitzgerald, and security evolutions influenced by incidents including the 1993 World Trade Center bombing—an attack with ties to individuals later connected to broader terrorism investigations involving agencies like the Federal Bureau of Investigation and the Central Intelligence Agency.
Architecture and Design
The architectural expression by Minoru Yamasaki emphasized slender vertical lines, a facade of aluminum and glass, and a narrow profile culminating in a broadcast antenna mast, reflecting design motifs similar to projects by Eero Saarinen and influences traceable to International Style precedents. Structural engineering by Leslie E. Robertson Associates produced a perimeter steel moment frame and a central core concept paralleling innovations used in skyscrapers like John Hancock Center and Seagram Building. Mechanical systems served tenants including EMC Corporation and hospitality operations like Windows on the World, while elevators and sky lobbies implemented technologies promoted by firms such as Otis Elevator Company.
The building accommodated observation decks and broadcasting facilities used by outlets such as ABC (American Broadcasting Company), CBS, and NBC, fostering cultural visibility similar to tourist sites like Statue of Liberty and Times Square. Public art installations and foundations associated with institutions like Museum of Modern Art had intermittent exhibits within the complex, and the plaza connected to transit hubs such as the PATH and the World Financial Center.
Role in the September 11 Attacks
On September 11, 2001, the North Tower was struck by American Airlines Flight 11, a hijacked Boeing 767, initiating a sequence that led to catastrophic structural failure and collapse. The impacts, fires, and eventual collapse were investigated by bodies including the National Institute of Standards and Technology and legal inquiries involving the Federal Aviation Administration and the 9/11 Commission. Victims included employees of firms like Cantor Fitzgerald and Marsh & McLennan Companies, prompting mass casualty responses coordinated by agencies such as the New York City Fire Department and New York Police Department, and emergency medical services from institutions like NewYork–Presbyterian Hospital and Bellevue Hospital Center.
The attack catalyzed global responses from governments and organizations including United Nations bodies, led to policy changes reflected in legislation like the USA PATRIOT Act, and precipitated international military operations involving actors such as the United States Department of Defense and allied coalitions. Investigations into the planning and financing of the attacks involved law enforcement coordination among agencies like the FBI, CIA, and international partners.
Legacy and Commemoration
The loss of the North Tower reshaped urban planning, memorial design, and corporate relocation strategies involving entities such as Silverstein Properties and agencies like the Port Authority of New York and New Jersey. Memorials on the site, including the National September 11 Memorial & Museum and surrounding landscaping by designers associated with projects at Ground Zero, honor victims from corporations like Cantor Fitzgerald and first responders from the Fire Department of New York and Police Department of the City of New York. Rebuilding efforts produced new structures such as One World Trade Center, transit projects like the World Trade Center Transportation Hub, and cultural initiatives involving institutions like the Skyscraper Museum and the 9/11 Memorial Museum.
Commemorative practices include annual observances by officials from the City of New York, ceremonies attended by representatives of international bodies like the European Union and delegations from countries represented among the victims, and educational programs run by organizations such as the National September 11 Memorial & Museum and academic studies at universities like Columbia University and New York University.