The U.S response to the terrorist attack on September 11th 2001 was to declare a War on Terror. President George W. Bush and Congress authorized the use of military force against those responsible for the attacks, which included the Taliban government in Afghanistan and the terrorist group Al Qaeda led by Osama bin Laden. The U.S led an invasion of Afghanistan in October 2001 to dismantle Al Qaeda and remove the Taliban from power. The U.S also implemented new measures to increase national security and prevent future terrorist attacks, including the creation of the Department of Homeland Security and the Patriot Act.
