The 9/11 attacks refer to a series of coordinated terrorist attacks that occurred on September 11, 2001, in the United States. Four commercial airplanes were hijacked by members of the extremist group al-Qaeda. Two of the planes were flown into the World Trade Center towers in New York City, causing both towers to collapse. A third plane struck the Pentagon in Arlington, Virginia, while the fourth plane, United Airlines Flight 93, crashed into a field in Pennsylvania after passengers attempted to regain control from the hijackers. The attacks resulted in the deaths of nearly 3,000 people and caused significant destruction. In response, the U.S. government launched the War on Terror, which included military operations in Afghanistan to dismantle al-Qaeda and remove the Taliban from power. The events of 9/11 had a profound impact on global security policies and led to increased surveillance and changes in air