Terrorism has left its mark forever on world history, with some of its strikes being remembered specifically because of their magnitude, repercussions, and geopolitical impact. Five such worst terrorist attacks in recorded history are: 1. 9/11 Attacks – United States (2001) On September 11, 2001, 19 Al-Qaeda members hijacked four aircraft, driving two into the World Trade Center buildings, one into the Pentagon, and another in Pennsylvania. Deaths: 2,996 killed, more than 6,000 injured Impact: Spurred global "War on Terror" and transformed U.S. foreign policy 2. Beslan School Siege – Russia (2004) Chechen separatists seized over 1,100 hostages, including children, at Beslan's School No. 1. The attack concluded with a fierce shootout. Casualties: 334 killed (186 children), 783 injured Impact: Ignited international condemnation and propelled Russia's counterterrorism activities 3. Mumbai Attacks – India (2008) Ten Lashkar-e-Taiba Pakistani terrorists orchestrated sho...