1. 9/11 Terrorist Attacks (2001)
On September 11, 2001, coordinated terrorist attacks struck the United States, claiming thousands of lives and shocking the world. The aftermath was immediate and profound: U.S. foreign policy shifted dramatically, launching the War on Terror with invasions of Afghanistan and Iraq. Heightened security protocols—especially in airports—and expanded surveillance became the global norm. The tragedy not only united nations against terrorism but also ignited debates on civil liberties and privacy.
