The 9/11 attacks refer to a series of coordinated terrorist attacks on September 11, 2001, where hijackers associated with the extremist group Al-Qaeda crashed planes into the World Trade Center in New York City and the Pentagon in Virginia.
Related terms
War on Terror: This term refers to the United States' response to the 9/11 attacks, which involved military actions, surveillance measures, and policy changes aimed at combating terrorism.
Patriot Act: It is an act passed shortly after 9/11 that expanded the government's surveillance powers in order to prevent future terrorist acts.
Homeland Security: Homeland Security is a government agency created after the 9/11 attacks to coordinate efforts to protect against and respond to terrorist threats within the United States.