Post-9/11 America refers to the period following the terrorist attacks on September 11, 2001, which significantly changed the nation's security policies and public perception. The attacks led to the implementation of the USA PATRIOT Act, which expanded government surveillance and law enforcement powers to prevent future terrorism. In addition to heightened security measures, the aftermath of 9/11 saw increased military involvement abroad, particularly in Afghanistan and Iraq. The events also sparked a national conversation about civil liberties, immigration, and the role of the Department of Homeland Security, which was established to coordinate efforts to protect the nation from future threats.