历史小径·世界史英语30篇（2）
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9/11 and the Global Shift in Security Policy
911事件与安全政策讨论
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On September 11, 2001, hijacked planes struck the World Trade Center, the Pentagon, and a field in Pennsylvania—killing nearly 3,000 people from 90 nations.
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Within weeks, the U.S. launched the ‘War on Terror’, invading Afghanistan to dismantle al-Qaeda and remove the Taliban regime that hosted it.
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Homeland Security became a cabinet-level department, coordinating airports, border checks, emergency response, and cyber defense nationwide.
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Passengers now remove shoes, limit liquids, and face biometric screening—procedures once rare outside high-risk zones.
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Many countries updated anti-terrorism laws, expanding surveillance powers while sparking debates about privacy versus protection.
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International cooperation increased: Interpol shared databases, Europol coordinated counter-radicalization programs, and ASEAN launched joint training exercises.
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Scholars note that security policies also reshaped immigration, education visas, and community policing—sometimes increasing suspicion toward Muslim minorities.
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Two decades later, policymakers still balance preparedness with civil liberties, asking how to prevent harm without eroding the values security aims to protect.