What major event happened on September 11, 2001, in the United States?

• A. The signing of the Constitution
• B. A significant economic crisis
• C. Terrorist attacks
• D. The end of the Cold War

Answer: (C)

The major event that occurred on September 11, 2001, in the United States was a series of terrorist attacks carried out by the extremist group al-Qaeda. This day is marked by the hijacking of four commercial airliners, with two of them being flown into the Twin Towers of the World Trade Center in New York City, leading to their collapse. A third plane struck the Pentagon, the headquarters of the U.S. Department of Defense, while the fourth plane, United Airlines Flight 93, was headed for a target in Washington, D.C., until passengers intervened, causing it to crash in a field in Pennsylvania.

These attacks resulted in significant loss of life, widespread destruction, and profound impacts on U.S. domestic and foreign policy, leading to the initiation of the War on Terror, increased security measures, and the establishment of the Department of Homeland Security. The events of 9/11 fundamentally transformed American society and international relations in the years that followed, making this answer not just a historical fact, but a pivotal moment in contemporary history.

The other options reflect significant historical events but do not pertain to September 11, 2001: the signing of the Constitution occurred in 1787, a significant economic crisis