What was the US response to the terrorist attack on September 11, 2001?(a) United States launched a global war on terrorism.

Answer 1

(b) The US invaded Afghanistan to remove the Taliban regime, which was harboring Osama bin Laden and Al-Qaeda.
(c) The US passed the USA PATRIOT Act to enhance surveillance and security measures.
(d) The US established the Department of Homeland Security to coordinate domestic security efforts.
(e) The US worked with international partners to conduct counterterrorism operations and disrupt terrorist networks.