Final answer:
The 9/11 attacks were a series of coordinated terrorist attacks that occurred in the United States on September 11, 2001. The attacks had a significant impact on both domestic and international affairs.
Step-by-step explanation:
The 9/11 attacks, also known as the September 11 attacks, were a series of coordinated terrorist attacks that took place in the United States on September 11, 2001. The attacks were carried out by 19 terrorists associated with the extremist group al-Qaeda.
Four commercial airplanes were hijacked, with two of them crashing into the Twin Towers of the World Trade Center in New York City. Another plane crashed into the Pentagon, while the fourth plane, United Airlines Flight 93, crashed into a field in Pennsylvania after passengers tried to regain control of the aircraft.
The 9/11 attacks had a profound impact on the world, leading to increased security measures, changes in U.S. foreign policy, and the initiation of the War on Terror.
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