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   » » Wiki: World Trade Center (1973–2001)
Tag Wiki 'World Trade Center (1973–2001)'.

The original World Trade Center was a large complex of seven buildings in , New York City, United States. It featured the landmark Twin Towers, which opened on April 4, 1973 and were destroyed in 2001 during the September 11 attacks. At the time of their completion, the Twin Towers — the original 1 World Trade Center, at ; and 2 World Trade Center, at — were the tallest buildings in the world. Other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. The complex was located in New York City's Financial District and contained of office space.

The core of the complex was built between 1975 and 1985, with a cost of $400 million (equivalent to $2.27 billion in 2018). The World Trade Center experienced a fire on , 1975, a bombing on , 1993, and a bank robbery on , 1998. In 1998, the Port Authority decided to privatize the World Trade Center, leasing the buildings to a private company to manage, and awarded the lease to Silverstein Properties in .

On the morning of September 11, 2001, -affiliated hijackers flew two Boeing 767 jets into the North and South Towers within minutes of each other; two hours later, both towers collapsed. The attacks killed 2,606 people in and within the vicinity of the towers, as well as all 157 on board the two aircraft. Falling debris from the towers, combined with fires that the debris initiated in several surrounding buildings, led to the partial or complete collapse of all the buildings in the complex and caused catastrophic damage to ten other large structures in the surrounding area.

The cleanup and recovery process at the World Trade Center site took eight months, during which the remains of the other buildings were demolished. The World Trade Center complex was rebuilt over more than a decade. The site is being rebuilt with six new skyscrapers, while a memorial to those killed in the attacks, a new rapid transit hub, and an were all opened. One World Trade Center, the tallest building in the Western Hemisphere at , is the lead building for the new complex, having been completed in November 2014.

Before the World Trade Center
The western portion of the World Trade Center site was originally under the , with the shoreline in the vicinity of Greenwich Street. It was on this shoreline close to the intersection of Greenwich and the former Dey Street that Dutch explorer 's ship, Tyger, burned to the waterline in November 1613, stranding Block and his crew and forcing them to overwinter on the island. They built the first European settlement in . The remains of the ship were buried under landfill when the shoreline was extended starting in 1797, and were discovered during excavation work in 1916. The remains of a second ship from the eighteenth century were discovered in 2010 during excavation work at the site. The ship, believed to be a Hudson River , was found just south of where the Twin Towers stood, about below the surface.

Later, the area became . New York City's Radio Row, which existed from 1921 to 1966, was a warehouse district on the Lower West Side in the Financial District. Harry Schneck opened City Radio on Cortlandt Street in 1921, and eventually the area held several blocks of electronics stores, with Cortlandt Street as its central axis. The used radios, war surplus electronics (e.g., ARC-5 radios), junk, and parts often piled so high they would spill out onto the street, attracting collectors and scroungers. According to a business writer, it also was the origin of the electronic component distribution business.

(2019). 9780131018846, Financial Times Prentice Hall.

The idea of establishing a World Trade Center in New York City was first proposed in 1943. The New York State Legislature passed a bill authorizing New York Governor Thomas E. Dewey to begin developing plans for the project but the plans were put on hold in 1949. During the late 1940s and 1950s, economic growth in New York City was concentrated in Midtown Manhattan. To help stimulate in Lower Manhattan, David Rockefeller suggested that the Port Authority build a World Trade Center in Lower Manhattan.

Plans for the use of to remove the shops in Radio Row bounded by Vesey, Church, Liberty, and West Streets began in 1961 when the Port Authority of New York and New Jersey was deciding to build the world's first world trade center. They had two choices: the east side of , near the South Street Seaport; and the west side, near the H&M station, . Initial plans, made public in 1961, identified a site along the for the World Trade Center. As a bi-state agency, the Port Authority required approval for new projects from the governors of both New York and . New Jersey Governor Robert B. Meyner objected to New York getting a $335 million project. Toward the end of 1961, negotiations with outgoing New Jersey Governor Meyner reached a stalemate.

At the time, ridership on New Jersey's Hudson and Manhattan Railroad (H&M) had declined substantially from a high of 113 million riders in 1927 to 26 million in 1958 after new automobile tunnels and bridges had opened across the . In a meeting between Port Authority director Austin J. Tobin and newly elected New Jersey Governor Richard J. Hughes, the Port Authority offered to take over the Hudson & Manhattan Railroad. The Port Authority also decided to move the World Trade Center project to the building site on the west side of Lower Manhattan, a more convenient location for New Jersey commuters arriving via PATH. With the new location and Port Authority acquisition of the H&M Railroad, New Jersey agreed to support the World Trade Center project. As part of the deal, the Port Authority renamed the H&M "Port Authority Trans-Hudson", or PATH for short.

In compensation for Radio Row business owners' displacement, the PANYNJ gave each business $3,000 each, without regard to how long the business had been there or how prosperous the business was. The Port Authority began purchasing the area for the World Trade Center by March 1965, and demolition of Radio Row was started in March 1966. It was completely demolished by the end of the year.

Approval was also needed from New York City Mayor and the New York City Council. Disagreements with the city centered on tax issues. On , 1966, an agreement was reached that the Port Authority would make annual payments to the City in lieu of taxes for the portion of the World Trade Center leased to private tenants. In subsequent years, the payments would rise as the rate increased.

Design and construction

On , 1962, the Port Authority announced the selection of as lead architect and as associate architects. Yamasaki devised the plan to incorporate twin towers; Yamasaki's original plan called for the towers to be 80 stories tall, but to meet the Port Authority's requirement for of office space, the buildings would each have to be 110 stories tall.

Yamasaki's design for the World Trade Center, unveiled to the public on , 1964, called for a square plan approximately in dimension on each side. The buildings were designed with narrow office windows wide, which reflected Yamasaki's as well as his desire to make building occupants feel secure. Yamasaki's design included building facades sheathed in aluminum-alloy. The World Trade Center was one of the most-striking American implementations of the architectural ethic of , and it was the seminal expression of Yamasaki's gothic modernist tendencies.

A major limiting factor in building height is the issue of elevators; the taller the building, the more elevators are needed to service the building, requiring more space-consuming elevator banks. Yamasaki and the engineers decided to use a new system with two ""—floors where people could switch from a large-capacity express elevator to a local elevator that goes to each floor in a section. This system, inspired by the local-express train operation that New York City's subway system used, allowed the design to stack local elevators within the same elevator shaft. Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of elevator shafts. Altogether, the World Trade Center had 95 express and local elevators.

(1977). 9780815621805, Syracuse University Press.

The structural engineering firm Worthington, Skilling, Helle & Jackson worked to implement Yamasaki's design, developing the tube-frame structural system used in the twin towers. The Port Authority's Engineering Department served as foundation engineers, Joseph R. Loring & Associates as electrical engineers, and Jaros, Baum & Bolles (JB&B) as mechanical engineers. Tishman Realty & Construction Company was the general contractor on the World Trade Center project. Guy F. Tozzoli, director of the World Trade Department at the Port Authority, and Rino M. Monti, the Port Authority's Chief Engineer, oversaw the project. As an interstate agency, the Port Authority was not subject to local laws and regulations of the City of New York, including . Nonetheless, the structural engineers of the World Trade Center ended up following draft versions of the new 1968 building codes.

The tube-frame design, earlier introduced by , was a new approach that allowed more open floor plans than the traditional design that distributed columns throughout the interior to support building loads. The World Trade Center towers used high-strength, load-bearing perimeter steel columns called that were spaced closely together to form a strong, rigid wall structure, supporting virtually all lateral loads such as wind loads, and sharing the gravity load with the core columns. The perimeter structure containing 59 columns per side was constructed with extensive use of prefabricated modular pieces, each consisting of three columns, three stories tall, connected by plates. The spandrel plates were welded to the columns to create the modular pieces off-site at the fabrication shop. Adjacent modules were bolted together with the splices occurring at mid-span of the columns and spandrels. The spandrel plates were located at each floor, transmitting between columns, allowing them to work together in resisting lateral loads. The joints between modules were staggered vertically, so that the column splices between adjacent modules were not at the same floor.

The core of the towers housed the elevator and utility shafts, restrooms, three stairwells, and other support spaces. The core of each tower was a rectangular area 87 by 135 feet (27 by 41 m) and contained 47 steel columns running from the bedrock to the top of the tower. The large, column-free space between the perimeter and core was bridged by prefabricated floor trusses. The floors supported their own weight as well as , providing lateral stability to the exterior walls and distributing wind loads among the exterior walls. The floors consisted of thick lightweight concrete slabs laid on a fluted steel deck. A grid of lightweight bridging trusses and main trusses supported the floors. The trusses connected to the perimeter at alternate columns and were on 6 foot 8 inch (2.03 m) centers. The top chords of the trusses were bolted to seats welded to the spandrels on the exterior side and a channel welded to the core columns on the interior side. The floors were connected to the perimeter spandrel plates with dampers that helped reduce the amount of sway felt by building occupants.

Hat (or "outrigger trusses") located from the 107th floor to the top of the buildings were designed to support a tall communication antenna on top of each building. Only 1 WTC (north tower) actually had an antenna fitted; it was added in 1978. The truss system consisted of six trusses along the long axis of the core and four along the short axis. This truss system allowed some load redistribution between the perimeter and core columns and supported the transmission tower.

The tube frame design, using steel core and perimeter columns protected with sprayed-on fire resistant material, created a relatively lightweight structure that would sway more in response to the wind compared to traditional structures, such as the Empire State Building that have thick, heavy masonry for of steel structural elements. During the design process, tests were done to establish design wind pressures that the World Trade Center towers could be subjected to and structural response to those forces. Experiments also were done to evaluate how much sway occupants could comfortably tolerate; however, many subjects experienced dizziness and other ill effects. One of the chief engineers worked with Canadian engineer Alan G. Davenport to develop viscoelastic to absorb some of the sway. These viscoelastic dampers, used throughout the structures at the joints between floor trusses and perimeter columns along with some other structural modifications, reduced the building sway to an acceptable level.

In March 1965, the Port Authority began acquiring property at the World Trade Center site. Demolition work began on , 1966, to clear thirteen square blocks of low rise buildings in Radio Row for construction of the World Trade Center. Groundbreaking for the construction of the World Trade Center took place on , 1966.
(2002). 9780756723705, Federal Emergency Management Agency. .

The site of the World Trade Center was located on landfill with the located below. To construct the World Trade Center, it was necessary to build a "" with a around the side of the site, to keep water from the Hudson River out. The slurry method selected by Port Authority's chief engineer, John M. Kyle, Jr., involved digging a trench, and as excavation proceeded, filling the space with a "slurry" mixture composed of and water, which plugged holes and kept groundwater out. When the trench was dug out, a steel cage was inserted and concrete was poured in, forcing the "slurry" out. It took fourteen months for the slurry wall to be completed. It was necessary before excavation of material from the interior of the site could begin. The of material excavated were used (along with other fill and dredge material) to expand the Manhattan shoreline across West Street to form Battery Park City.

In January 1967, the Port Authority awarded $74 million in contracts to various steel suppliers. Construction work began on the North Tower in , and construction on the South Tower was under way by . The original Hudson Tubes, which carried PATH trains into Hudson Terminal, remained in service during the construction process until 1971, when a new station opened. The ceremony of 1 WTC (North Tower) took place on , 1970, while 2 WTC's ceremony (South Tower) occurred later on , 1971. The first tenants moved into the North Tower on , while the South Tower started accepting tenants in . When the World Trade Center twin towers were completed, the total costs to the Port Authority had reached $900 million. The ribbon cutting ceremony was on , 1973.

In addition to the twin towers, the plan for the World Trade Center complex included four other low-rise buildings, which were built in the early 1970s. The 47-story 7 World Trade Center building was added in the 1980s, to the north of the main complex. Altogether, the main World Trade Center complex occupied a superblock.

(2019). 9780805074949, Metropolitan Books, Henry Holt and Co.

Plans to build the World Trade Center were controversial. The site for the World Trade Center was the location of Radio Row, home to hundreds of commercial and industrial tenants, property owners, small businesses, and approximately 100 residents, many of whom fiercely resisted forced relocation. A group of affected small businesses sought an challenging the Port Authority's power of . The case made its way through the court system to the United States Supreme Court; the Court refused to accept the case.

Private real estate developers and members of the Real Estate Board of New York, led by Empire State Building owner Lawrence A. Wien, expressed concerns about this much "subsidized" office space going on the open market, competing with the private sector when there was already a glut of vacancies. The World Trade Center itself was not rented out completely until after 1979 and then only because the complex's subsidy by the Port Authority made rents charged for its office space cheaper than that of comparable office space in other buildings. Others questioned whether the Port Authority should have taken on a project described by some as a "mistaken social priority".

The World Trade Center design brought criticism of its aesthetics from the American Institute of Architects and other groups. , author of The City in History and other works on , criticized the project and described it and other new skyscrapers as "just glass-and-metal filing cabinets". The Twin Towers were described as looking similar to "the boxes that the Empire State Building and the Chrysler Building came in". The twin towers' narrow office windows, only wide and framed by pillars that restricted views on each side to narrow slots, were disliked by many. Activist and sociologist also criticized plans for the WTC's construction, arguing that the waterfront should be kept open for New Yorkers to enjoy.

(2019). 9780813537924, Rutgers University Press.

The trade center's "superblock", replacing a more traditional, dense neighborhood, was regarded by some critics as an inhospitable environment that disrupted the complicated traffic network typical of Manhattan. For example, in his book The Pentagon of Power, Lewis Mumford denounced the center as an "example of the purposeless giantism and technological exhibitionism that are now eviscerating the living tissue of every great city".

(1974). 9780156716109, Harcourt Brace Jovanovich.

In 1982, the immense plaza between the twin towers was renamed after the Port Authority's late chairman, Austin J. Tobin. During the summer, the Port Authority installed a portable stage within Tobin Plaza for performers. For many years, the Austin J. Tobin Plaza was often beset by brisk winds at ground level owing to the between the two towers. In fact, some gusts were so high that pedestrian travel had to be aided by ropes. In 1999, the outdoor plaza reopened after undergoing $12 million renovations, which involved replacing pavers with gray and pink stones, adding new benches, planters, new restaurants, food kiosks and outdoor dining areas.

On a typical weekday 50,000 people worked in the towers with another 200,000 passing through as visitors. The complex was so large that it had its own zip code: 10048. The towers offered expansive views from the observation deck atop the South Tower and the Windows on the World restaurant on top of the North Tower. The Twin Towers became known worldwide, appearing in numerous movies and television shows as well as on postcards and other merchandise, and became seen as a New York icon, in the same league as the Empire State Building, Chrysler Building and the Statue of Liberty. The World Trade Center was compared to Rockefeller Center, which David Rockefeller's brother Nelson had developed in midtown Manhattan.

North and South Towers
One World Trade Center and Two World Trade Center, commonly the Twin Towers, the idea of which was brought up by , were designed as framed tube structures, which provided tenants with open floor plans, uninterrupted by columns or walls. They were the main buildings of the World Trade Center. The North Tower (One World Trade Center), the tallest building in the world at by the time of its completion, began construction in 1966 with the South Tower (2 World Trade Center); extensive use of prefabricated components helped to speed up the construction process, and the first tenants moved into the North Tower in December 1970, while it was still under construction. When completed in 1973, the South Tower, Two World Trade Center (the South Tower) became the second tallest building in the world at ; the South Tower's rooftop observation deck was high and its indoor observation deck was high. Each tower stood over high, and occupied about of the total of the site's land. During a press conference in 1973, Yamasaki was asked, "Why two 110-story buildings? Why not one 220-story building?" His response was: "I didn't want to lose the human scale."

When completed in 1972, 1 World Trade Center became the tallest building in the world for two years, surpassing the Empire State Building after a 40-year reign. The North Tower stood tall and featured a telecommunications antenna or mast that was added at the top of the roof in 1978 and stood tall. With the -tall antenna/mast, the highest point of the North Tower reached . Chicago's , finished in , reached at the rooftop. Throughout their existence, the WTC towers had more floors (at 110) than any other building. This number was not surpassed until the advent of the , which opened in 2010. Each tower had a total mass of around 500,000 tons.

Top of the World observation deck
Although most of the space in the World Trade Center complex was off-limits to the public, the South Tower featured two public viewing areas called Top of the World Trade Center Observatories: an indoor one on the 107th floor and an outdoor one on the roof. Visitors would pass through security checks added after the 1993 World Trade Center bombing, then were sent to the 107th-floor indoor observatory at a height of . The exterior columns on each side of the floor were narrowed to allow 28 inches of window width between them. The Port Authority renovated the observatory in 1995, then leased it to Ogden Entertainment to operate. Attractions added to the observation deck included a simulated helicopter ride around the city. The 107th-floor food court was designed with a subway car theme and featured and Nathan's Famous Hot Dogs. Weather permitting, visitors could ride two short escalators up from the 107th-floor viewing area to an outdoor platform at a height of .
(1996). 9780823216802, Fordham University Press.
On a clear day, visitors could see up to . An anti-suicide fence was placed on the roof itself, with the viewing platform set back and elevated above it, requiring only an ordinary railing and leaving the view unobstructed, unlike the observation deck of the Empire State Building.

Windows on the World restaurant
The North Tower had a restaurant on its 106th and 107th floors called Windows on the World, which opened in . The restaurant was developed by at a cost of more than $17 million.
(2019). 9781454921066, Sterling Epicure.
Aside from the main restaurant, two offshoots were located at the top of the North Tower: "Hors d'Oeuvrerie" (offered a Danish smorgasbord during the day and sushi in the evening) and "Cellar in the Sky" (a small wine bar). Windows on the World also had a wine school program run by , who published a book on the course.
(2019). 9781402787935, Sterling Publishing Company, Incorporated. .

Windows on the World was closed following the 1993 World Trade Center bombing. Upon reopening in 1996, Hors d'Oeuvrerie and Cellar in the Sky were replaced with the "Greatest Bar on Earth" and "Wild Blue". In 2000, its last full year of operation, Windows on the World reported revenues of $37 million, making it the highest-grossing restaurant in the United States. The Sky Dive Restaurant, on the 44th floor of the North Tower, was also operated by Windows on the World.

In its last iteration, Windows on the World received mixed reviews. , a New York Times food critic, said in December 1996 that "nobody will ever go to Windows on the World just to eat, but even the fussiest food person can now be content dining at one of New York's favorite tourist destinations." She gave the restaurant two out of four stars, signifying a "very good" quality rather than "excellent" (three stars) or "extraordinary" (four stars). In his 2009 book Appetite, William Grimes wrote that "At Windows, New York was the main course."

(2009). 9781429990271, Farrar, Straus and Giroux. .
In 2014, Ryan Sutton of compared the now-destroyed restaurant's cuisine to that of its replacement, One World Observatory. He stated, "Windows helped usher in a new era of captive audience dining in that the restaurant was a destination in itself, rather than a lazy byproduct of the vital institution it resided in."

Other buildings
Five smaller buildings stood around the block. One was the 22-floor hotel, which opened at the southwest corner of the site in 1981 as the Vista Hotel; in 1995, it became the Marriott World Trade Center (3 WTC). Three low-rise buildings (4 WTC, 5 WTC, and 6 WTC) in the same hollow tube design as the towers also stood around the plaza. 6 World Trade Center, at the northwest corner, housed the United States Customs Service and the U.S. Commodities Exchange. 5 World Trade Center was located at the northeast corner above the PATH station and 4 World Trade Center was at the southeast corner. In 1987, construction was completed on a 47-floor office building, 7 World Trade Center, located to the north of the superblock. Beneath the World Trade Center complex was an underground shopping mall, which in turn had connections to various mass transit facilities, including the New York City Subway system and the Port Authority's PATH trains.

One of the world's largest gold depositories was stored underneath the World Trade Center, owned by a group of commercial banks. The 1993 bombing detonated close to the vault. Gold, Recovery of The Towers’ buried treasure, NY Mag, , 2011 Seven weeks after the attacks, $230 million in precious metals was removed from basement vaults of 4 WTC, which included 3,800 100-Troy-ounce 24 carat gold bars and 30,000 1,000-ounce silver bars. Reuters, , 2001: Buried WTC gold returns to futures trade. Retrieved , 2008.

Operating history

February 13, 1975, fire
On February 13, 1975, a broke out on the 11th floor of the North Tower. Fire spread through the tower to the 9th and 14th floors by igniting the insulation of telephone cables in a utility shaft that ran vertically between floors. Areas at the furthest extent of the fire were extinguished almost immediately and the original fire was put out in a few hours. Most of the damage was concentrated on the 11th floor, fueled by cabinets filled with paper, alcohol-based fluid for office machines, and other office equipment. protected the steel and there was no structural damage to the tower. In addition to damage caused by the fire on the 9th – 14th floors, water from the extinguishing of the fires damaged a few floors below. At that time, the World Trade Center had no fire sprinkler systems.

February 26, 1993, bombing
The first terrorist attack on the World Trade Center occurred on February 26, 1993, at 12:17 p.m. A truck filled with of explosives, planted by , detonated in the underground garage of the North Tower.
(2019). 9781555535094, Northeastern University Press.
The blast opened a 100-foot (30 m) hole through five sublevels with the greatest damage occurring on levels B1 and B2 and significant structural damage on level B3. Six people were killed and 1,042 others were injured during escape attempts complicated by smoke infiltration from the base of the building up to the 93rd floor of both towers. Many people inside the North Tower were forced to walk down darkened stairwells that contained no emergency lighting, some taking two hours or more to reach safety.

Yousef fled to Pakistan after the bombing but was arrested in in , and was extradited back to the United States to face trial. Sheikh Omar Abdel Rahman was convicted in 1996 for involvement in the bombing and other plots. Yousef and were convicted in for their carrying out the bombing. Four others had been convicted in for their involvement in the 1993 bombing. According to a presiding judge, the conspirators' chief aim at the time of the attack was to destabilize the north tower and send it crashing into the south tower, toppling both landmarks.

Following the bombing, floors that were blown out needed to be repaired to restore the structural support they provided to columns. The slurry wall was in peril following the bombing and loss of the floor slabs that provided lateral support against pressure from Hudson River water on the other side. The refrigeration plant on sublevel B5, which provided air conditioning to the entire World Trade Center complex, was heavily damaged. After the bombing, the Port Authority installed markings in the stairwells. The fire alarm system for the entire complex needed to be replaced because critical wiring and signaling in the original system was destroyed. As a memorial to the victims of the bombing of the tower, a was installed with the names of those who had been killed in the blast. However, the memorial was destroyed following the attacks. Names of the victims of the 1993 bombing are included in the National September 11 Memorial & Museum.

January 14, 1998, robbery
In January 1998, Mafia member , who had gained maintenance access to the World Trade Center, arranged a three-man crew for a heist that netted over $2 million from a Brinks delivery to the eleventh floor of the World Trade Center.
(2019). 9780805086591, Henry Holt Melia distributor.

Other events
In 1981, an Aerolineas Argentinas airliner was guided away by air traffic controllers following radar signals that indicated it was on a collision course with the North Tower (1 WTC). The aircraft was flying at a much lower altitude than regulations recommended, while scheduled to land at nearby Kennedy International Airport.

In 1983, on , high-rise firefighting and rescue advocate successfully climbed the outside of the North Tower (1 WTC). His stunt was meant to call attention to the inability to rescue people potentially trapped in the upper floors of skyscrapers.

The 1995 PCA world chess championship was played on the 107th floor of the South Tower.

Proposed lease
In 1998, the Port Authority approved plans to privatize the World Trade Center. In 2001, the Port Authority sought to lease the World Trade Center to a private entity. Bids for the lease came from Vornado Realty Trust, a joint bid between Brookfield Properties Corporation and Boston Properties, and a joint bid by Silverstein Properties and The Westfield Group. By privatizing the World Trade Center, it would be added to the city's tax rolls and provide funds for other Port Authority projects. On , 2001, the Port Authority announced that Vornado Realty Trust had won the lease for the World Trade Center, paying $3.25 billion for the 99-year lease. Vornado outbid Silverstein by $600 million though Silverstein upped his offer to $3.22 billion. However, Vornado insisted on last minute changes to the deal, including a shorter 39-year lease, which the Port Authority considered nonnegotiable. Vornado later withdrew and Silverstein's bid for the lease to the World Trade Center was accepted on , 2001, and closed on , 2001.

On September 11, 2001, Islamist terrorists hijacked American Airlines Flight 11 and crashed it into the northern façade of the North Tower at 8:46:40 a.m., the aircraft striking between the 93rd and 99th floors. Seventeen minutes later, at 9:03:11 a.m., a second group crashed the similarly hijacked United Airlines Flight 175 into the southern façade of the South Tower, striking it between the 77th and 85th floors. The damage caused to the North Tower by Flight 11 destroyed any means of escape from above the impact zone, trapping 1,344 people. Flight 175 had a much more off-centered impact compared to Flight 11, and a single stairwell was left intact; however, only a few people managed to pass through it successfully before the tower collapsed. Although the South Tower was struck lower than the North Tower, thus affecting more floors, a smaller number, fewer than 700, were killed instantly or trapped.

At 9:59 a.m., the South Tower collapsed after burning for approximately 56 minutes. The fire caused steel structural elements, already weakened from the plane impact, to fail. The North Tower collapsed at 10:28 a.m., after burning for approximately 102 minutes. At 5:20 p.m. on , 2001, 7 World Trade Center started to collapse with the crumble of the east penthouse, and it collapsed completely at 5:21 p.m. owing to uncontrolled fires causing structural failure.

The Marriott World Trade Center, a hotel, was destroyed during the collapse of the two towers. The three remaining buildings in the WTC plaza were extensively damaged by debris and later were demolished. The cleanup and recovery process at the World Trade Center site took eight months. The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned owing to the uninhabitable toxic conditions inside; it was deconstructed, with work completed in early 2011. The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was also condemned owing to extensive damage, and it was demolished and completely rebuilt.

In the immediate aftermath of the attacks, media reports suggested that tens of thousands might have been killed in the attacks, as over 50,000 people could be inside the World Trade Center, although the National Institute of Standards and Technology (NIST) estimated that approximately 17,400 occupants were in the towers at the time of the attacks. Ultimately, 2,753 death certificates (excluding those for hijackers) were filed relating to the 9/11 attacks in New York City, including one filed for Felicia Dunn-Jones, who was added to the official death toll in ; Dunn-Jones died five months later from a lung condition linked to exposure to dust during the collapse of the World Trade Center. Three other victims were then added to the official death toll by the city medical examiner's office: Dr. Sneha Anne Philip, who was last seen the day before the attacks; Leon Heyward, a man who developed lymphoma and subsequently died in 2008 as a result of dust ingestion during the events following the attacks to the Twin Towers; and Jerry Borg, who died in December 2010 of pulmonary sarcoidosis determined in June 2011 to be the result of dust from the attacks. 2,192 died in and around the World Trade Center, including 658 employees of Cantor Fitzgerald L.P. (an investment bank on the 101st–105th floors of One World Trade Center), 295 employees of Marsh & McLennan Companies (which was located immediately below Cantor Fitzgerald on floors 93–101, the location of Flight 11's impact), and 175 employees of . In addition to the civilian deaths, 343 New York City Fire Department (FDNY) were killed in the attacks, as well as 71 law enforcement officers, including 37 members of the Port Authority Police Department (PAPD) and 23 members of the New York City Police Department (NYPD). Ten years after the attacks, remains of only 1,629 victims had been identified. Of all the people who were still in the towers when they collapsed, only 20 were pulled out alive.

New World Trade Center
Over the following years, plans were created for the reconstruction of the World Trade Center. The Lower Manhattan Development Corporation (LMDC), established in to oversee the rebuilding process, organized competitions to select a and memorial design. Memory Foundations, designed by , was selected as the master plan; however, substantial changes were made to the design.

The first new building at the site was 7 WTC, which opened in . The memorial section of the National September 11 Memorial & Museum opened on September 11, 2011, and the museum opened in May 2014. 1 WTC opened on , 2014; 4 WTC opened on , 2013; and 3 WTC opened on June 11, 2018.

, according to an agreement made with Silverstein Properties Inc., the new 2 WTC will not be built to its full height until sufficient leasing is established to make the building financially viable. In Summer 2015, Silverstein Properties revealed plans for a redesigned Tower 2 with as the core tenant; the -designed structure was expected to be finished by 2020. 5 WTC will be developed by the Port Authority of New York and New Jersey, but above-ground construction was suspended in November 2013 due to a lack of tenants as well as disputes between the Port Authority and the Lower Manhattan Development Corporation.


On surrounding community
The original World Trade Center created a superblock that cut through the area's street grid, isolating the complex from the rest of the community. The Port Authority had demolished several streets to make way for the towers within the World Trade Center. The project involved combining the twelve-block area bounded by Vesey, Church, Liberty, and West Streets on the north, east, south, and west, respectively. 7 World Trade Center, built on the superblock's north side in the late 1980s, was built over another block of Greenwich Street. The building acted as a physical barrier separating to the north and the Financial District to the south.
(2019). 9780190607043, Oxford University Press. .
The underground mall at the World Trade Center also drew shoppers away from surrounding streets.

The project was seen as being monolithic and overambitious, while not involving public input. By contrast, the rebuilding plans had significant public input, and the public supported rebuilding a street grid through the World Trade Center site.

(2019). 9780230341388, St. Martin's Press. .
One of the rebuilding proposals included building an enclosed shopping street along the path of Cortlandt Street, one of the streets demolished to make room for the original World Trade Center. However, it was ultimately decided to build Cortlandt, Fulton, and , which had been destroyed during the original World Trade Center's construction.

As an icon of popular culture
Prior to 2001, the World Trade Center was an icon of New York City, and the Twin Towers were the centerpiece that represented the entire complex. The Twin Towers were used as "establishing shots", standing for New York City as a whole. In 1999, one writer noted: "Nearly every guidebook in New York City lists the Twin Towers among the city's top ten attractions." Consequently, there were several high-profile events that occurred at the World Trade Center. The most notable high-profile event that was held at the original WTC occurred in 1974. French high wire acrobatic performer walked between the two towers on a tightrope, as shown in the documentary film Man on Wire (2008) and depicted in the feature film The Walk (2015). Petit walked between the towers eight times on a steel cable. In 1977, Brooklyn toymaker scaled the exterior of the South Tower (2 WTC). He later said, "It looked unscalable; I thought I'd like to try it."

The complex was featured in numerous works of popular culture; one estimate in 2006 noted that the World Trade Center has appeared in some form in 472 films. Several iconic meanings were attributed to the World Trade Center. The film critic , who lived near the complex, stated that the World Trade Center's appearance in the 1978 film Superman "summarized a certain kind of American grandeur ... the grandeur, I would say, of sheer American powerfulness." Remarking on the towers' destruction in the 1996 film Independence Day, Sterritt said, "The Twin Towers have been destroyed in various disaster movies that were made before 9/11. That became something that you couldn't do even retroactively after 9/11." Other motifs included romance, depicted in the 1988 film Working Girl, and corporate avarice, depicted in Wall Street (1987) and The Bonfire of the Vanities (1987). Comic books, animated cartoons, television shows, video games, and music videos also used the complex as a setting.

After the September 11 attacks, some movies and TV shows deleted scenes or episodes set within the World Trade Center. For example, episode "The City of New York vs. Homer Simpson", which first aired in 1997, was removed from syndication after the attacks because a scene showed the World Trade Center. Songs that mentioned the World Trade Center were no longer allowed to be aired on the radio, and the release dates of some films, such as Sidewalks of New York, were delayed so producers could remove scenes that included the World Trade Center.

Other episodes and films mentioned the attacks directly, or depicted the World Trade Center in alternate contexts. The production of some family-oriented films was also sped up due to a large demand for that genre following the attacks, while demand for horror and action films decreased. Within a short time, however, demand for horror and action films returned to normal. By the first anniversary of the attacks, over sixty "memorial films" had been created. Filmmakers were criticized for removing scenes related to the World Trade Center. Rita Kempley of The Washington Post stated that "if we erase the towers from our art, we erase from our memories." Author compared the phenomenon to the 1949 novel Nineteen Eighty-Four, where historic mentions of events are retroactively "rectified". 's film World Trade Center—the first movie that specifically examined the effects of the attacks on the World Trade Center, as opposed to the effects elsewhere—was released in 2006.

See also
  • List of tallest buildings in New York City
  • Artwork damaged or destroyed in the September 11 attacks
  • World Trade Center in popular culture


External links

(North Tower)

(North Tower)

(North Tower)

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