How did the federal government respond to the September 11th?

In response to the September 11 attacks, the federal government implemented a series of measures aimed at enhancing national security and preventing future terrorism. This included the creation of the Department of Homeland Security in 2003, the enactment of the USA PATRIOT Act to expand surveillance and law enforcement powers, and the initiation of military operations in Afghanistan to dismantle al-Qaeda and remove the Taliban regime. These actions marked a significant shift in U.S. domestic and foreign policy, prioritizing counterterrorism efforts and national security.