Collapse of the World Trade Center in the context of "September 11 attacks"

Manhattan is the most densely populated and geographically smallest of the five boroughs of New York City. Coextensive with New York County, Manhattan is the smallest county by area in the U.S. state of New York. Located almost entirely on Manhattan Island near the southern tip of the state, Manhattan is centrally located in the Northeast megalopolis and the urban core of the New York metropolitan area. Manhattan serves as New York City's economic and administrative center and has been described as the cultural, financial, media, and entertainment capital of the world.

Present-day Manhattan was originally part of Lenape territory. European settlement began with the establishment of a trading post by Dutch colonists in 1624 on Manhattan Island; the post was named New Amsterdam in 1626. The territory came under English control in 1664 and was renamed New York after King Charles II of England granted the lands to his brother, the Duke of York. New York, based in present-day Lower Manhattan, served as the capital of the United States from 1785 until 1790. The Statue of Liberty in New York Harbor greeted millions of arriving immigrants in the late 19th century and is a world symbol of the United States and its ideals. Manhattan became a borough during the consolidation of New York City in 1898, and houses New York City Hall, the seat of the city's government. Harlem in Upper Manhattan became the center of what is now known as the cultural Harlem Renaissance in the 1920s. The Stonewall Inn in Greenwich Village, part of the Stonewall National Monument, is considered the birthplace in 1969 of the modern gay-rights movement, cementing Manhattan's central role in LGBTQ culture. Manhattan was the site of the original World Trade Center, which was destroyed during the September 11 terrorist attacks in 2001.

The Empire State Building is a 102-story, Art Deco-style supertall skyscraper in the Midtown South neighborhood of Manhattan, New York City, United States. The building was designed by Shreve, Lamb & Harmon and built from 1930 to 1931. Its name is derived from "Empire State", the nickname of New York state. The building has a roof height of 1,250 feet (380 m) and stands a total of 1,454 feet (443.2 m) tall including its antenna. The Empire State Building was the world's tallest building until the North Tower of the World Trade Center was topped out in 1970; following the September 11 attacks in 2001, the Empire State Building was once more New York City's tallest building until it was surpassed in 2012 by One World Trade Center. As of 2025, the building is the eighth-tallest building in New York City, the tenth-tallest completed skyscraper in the United States, and the 59th-tallest completed skyscraper in the world.

The site of the Empire State Building, on the west side of Fifth Avenue between West 33rd and 34th Streets, was developed in 1893 as the Waldorf–Astoria Hotel. In 1929, Empire State Inc. acquired the site and devised plans for a skyscraper there. The design for the Empire State Building was changed fifteen times until it was ensured to be the world's tallest building. Construction started on March 17, 1930, and the building opened thirteen and a half months afterward on May 1, 1931. Despite favorable publicity related to the building's construction, because of the Great Depression and World War II, its owners did not make a profit until the early 1950s.

The Joe DiMaggio Highway, commonly called the West Side Highway and formerly the Miller Highway, is a 5.42-mile-long (8.72 km) mostly surface section of New York State Route 9A (NY 9A), running from West 72nd Street along the Hudson River to the southern tip of Manhattan in New York City. It replaced the West Side Elevated Highway, built between 1929 and 1951, which was shut down in 1973 due to neglect and lack of maintenance, and was dismantled by 1989. North of 72nd Street, the roadway continues as the Henry Hudson Parkway.

The current highway was complete by 2001, but required reconstruction after the September 11 attacks that year, when the collapse of the World Trade Center caused debris to fall onto the surrounding areas, damaging the highway. It uses the surface streets that existed before the elevated highway was built: West Street, Eleventh Avenue and Twelfth Avenue. A short section of Twelfth Avenue still runs between 125th and 138th Streets, under the Riverside Drive Viaduct. Eleventh Avenue is a separate street north of 22nd Street. The portion between West 42nd Street and Canal Street is part of the Lincoln Highway.

One World Trade Center, also known as One WTC and as the Freedom Tower, is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City. Designed by David Childs of Skidmore, Owings & Merrill, One World Trade Center is the tallest building in the United States, the tallest building in the Western Hemisphere, and the seventh-tallest in the world. The supertall structure has the same name as the North Tower of the original World Trade Center, which was destroyed in the terrorist attacks of September 11, 2001. The new skyscraper stands on the northwest corner of the 16-acre (6.5 ha) World Trade Center site, on the site of the original 6 World Trade Center. It is bounded by West Street to the west, Vesey Street to the north, Fulton Street to the south, and Washington Street to the east.

The construction of below-ground utility relocations, footings, and foundations for the new building began on April 27, 2006. One World Trade Center became the tallest structure in New York City on April 30, 2012, when it surpassed the height of the Empire State Building. The tower's steel structure was topped out on August 30, 2012. On May 10, 2013, the final component of the skyscraper's spire was installed, making the building, including its spire, reach a total height of 1,776 feet (541 m). Its height in feet is a deliberate reference to the year when the United States Declaration of Independence was signed. The building opened on November 3, 2014; the One World Observatory opened on May 29, 2015.

The September 11 attacks, colloquially and perhaps more commonly known as 9/11, were four coordinated Islamist terrorist suicide attacks by al-Qaeda against the United States in 2001. Nineteen terrorists hijacked four commercial airliners, then flew one into each of the Twin Towers at the World Trade Center in New York City, and another into the Pentagon, the headquarters of the U.S. Department of Defense, in Arlington County, Virginia. The fourth plane crashed in a rural Pennsylvania field during a passenger revolt. In response to the attacks, the United States launched and waged the global war on terror over two decades, with the mission to eliminate hostile groups deemed terrorist organizations, and the governments purported to support them.

Ringleader and hijacker Mohamed Atta flew American Airlines Flight 11 into the North Tower of the World Trade Center complex at 8:46 a.m. Seventeen minutes later at 9:03 a.m., hijacker Marwan al-Shehhi flew United Airlines Flight 175 into the South Tower. Both collapsed within an hour and forty-two minutes, destroying the remaining five structures in the complex. Hijacker Hani Hanjour flew American Airlines Flight 77 into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flown by hijacker Ziad Jarrah, was believed by investigators to target either the United States Capitol or the White House. Alerted to the previous attacks, the passengers revolted against the hijackers who crashed the aircraft into a field near Shanksville, Pennsylvania, at 10:03 a.m. The Federal Aviation Administration ordered an indefinite ground stop for all air traffic in U.S. airspace, preventing any further aircraft departures until September 13 and requiring all airborne aircraft to return to their point of origin or divert to Canada. The actions undertaken in Canada to support incoming aircraft and their occupants were collectively titled Operation Yellow Ribbon.

The original Two World Trade Center (also known as the South Tower, Tower 2, Building Two, or 2 WTC) was one of the Twin Towers in the original World Trade Center Complex in New York City. The Tower was completed and opened in 1973 at a height of 1,362 feet (415 m) to the roof, distinguishable from its twin, the North Tower (1 World Trade Center), by the absence of a television antenna. On the 107th floor of this building was a popular tourist attraction, "Top of the World Trade Center Observatories," and on the roof was an outdoor observation deck accessible to the public and a disused helipad at the center. The address of this building was 2 World Trade Center, with the WTC complex having its own ZIP code of 10048.

The South Tower was destroyed along with the North Tower in the September 11 attacks. At 9:03 a.m, seventeen minutes after its twin was hit, the South Tower was struck by United Airlines Flight 175. Although it was the second of the two skyscrapers to be hit by a hijacked airliner, it was the first to collapse, at 9:59 a.m., after burning for 56 minutes. Of the 2,977 victims killed in the attacks, around 1,000 were in the South Tower or on the ground.

6 World Trade Center was a seven-story building in Lower Manhattan in New York City. It opened in 1974 and was the building in the World Trade Center complex that had the fewest stories. The building served as the U.S. Customs House for New York. It was demolished in late 2001 due to the damage sustained by the collapse of the North Tower during the September 11 attacks. Its site is now the location of the new One World Trade Center and the Perelman Performing Arts Center.