The primary consequence of the September 11 attacks in 2001 was the significant shift in U.S. domestic and foreign policy. The attacks prompted the United States to launch the War on Terror, leading to military action in Afghanistan to dismantle Al-Qaeda and remove the Taliban from power. Domestically, the attacks resulted in heightened security measures, including the establishment of the Department of Homeland Security and the implementation of the USA PATRIOT Act, aimed at enhancing counterterrorism efforts. The attacks also spurred global discussions on terrorism, national security, and civil liberties, reshaping international relations and security policies.