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.