On September 11, 2001 terrorist attacks carried out by the Islamist extremist network al-Qaeda resulted in a tragic loss of life. On that day, four commercial airplanes were hijacked and used as weapons to impact important buildings in the United States. Two of the planes hit the North and South towers of the World Trade Center in New York, causing the towers to collapse. The third plane impacted the Pentagon, while the fourth plane crashed into a field before reaching its intended target. The attacks resulted in the death of 2,977 victims, and many thousands of people were injured.

The September 11 attacks had far-reaching political, economic, and social impacts. Some of the most significant repercussions include the start of America's war on terror and the invasion of Afghanistan to depose the Taliban. The attacks also led to the passing of the USA PATRIOT Act, which expanded government surveillance powers, and the creation of the Department of Homeland Security. The attacks led to a downturn in the US economy, with significant losses in the stock market, tourism, and the airline industry. 9/11 had a profound impact on the American psyche, leading to a sense of fear and insecurity that has lasted to this day.
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