Hijackers of the September 11, 2001 Attacks
Summary of the 19 hijackers who carried out the coordinated September 11 attacks, their targets, background, and the aftermath in aviation security and counterterrorism.
Overview
The September 11, 2001 attacks were carried out by a group of 19 hijackers who acted in a coordinated, suicide-driven operation. The perpetrators were members of a violent extremist network associated with Al‑Qaeda and motivated by an extremist ideology often described in public sources as Islamist extremism. The group seized commercial airliners and used them as weapons, deliberately targeting symbolic and strategic sites in the United States. In total the hijackers boarded and commandeered four aircraft on the morning of September 11.
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Flight assignments and targets
- American Airlines Flight 11 — five hijackers; crashed into the North Tower of the World Trade Center (North Tower).
- United Airlines Flight 175 — five hijackers; crashed into the South Tower of the World Trade Center.
- American Airlines Flight 77 — five hijackers; crashed into the Pentagon in Arlington, Virginia.
- United Airlines Flight 93 — four hijackers; the aircraft crashed in a field near Shanksville, Pennsylvania after passengers attempted to retake control.
Background and preparation
The operation was planned and financed by members of Al‑Qaeda and involved travel, training, and coordination over months. Many of the hijackers entered the United States legally and some received flight training at civilian schools to learn basic piloting skills. Investigations found the plot required logistical support, selection of particular commercial flights, and careful timing to achieve simultaneous strikes.
Impact and consequences
The attacks killed and injured thousands, destroyed large portions of the World Trade Center complex, and damaged the Pentagon. The events led to major changes in aviation security, including strengthened passenger screening, changes in cockpit security and airline procedures, and the creation of the Transportation Security Administration. They also triggered wide-reaching counterterrorism policies, new intelligence measures, and international cooperation against extremist networks.
Notable facts and legacy
The 19 hijackers represented several nationalities; a majority were citizens of Saudi Arabia, alongside individuals from other countries. Post‑attack investigations, including the official inquiries, established identities, travel histories, and links to Al‑Qaeda leaders. The attacks remain a defining event of the early 21st century, shaping global security policy, emergency response planning, and public memory.
Further reading
Extensive reporting, government reports, and scholarly analyses explore the organization of the hijackers, the operational details, and the long-term effects on law, policy, and society. For more focused summaries and primary-source material, consult investigative reports and official archives from the period.
Author
AlegsaOnline.com Hijackers of the September 11, 2001 Attacks Leandro Alegsa
URL: https://en.alegsaonline.com/art/132700