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The September 11, 2001 terrorist attacks fundamentally transformed commercial aviation security across the globe. When four hijacked planes were used in coordinated attacks on New York and Washington, DC, resulting in nearly 3,000 deaths, aviation authorities recognized the urgent need for sweeping changes to protect travelers and aircraft.
In response to the attacks, the US Congress passed the Aviation and Transportation Security Act in November 2001, establishing the Transportation Security Administration and implementing federal screening requirements for all passengers and luggage. Additional measures quickly followed, including reinforced cockpit doors designed to prevent unauthorized access, an expanded Federal Air Marshal Service, and prohibitions on knives and box cutters in carry-on bags. Other nations adopted similar cockpit security standards shortly after.
Subsequent security incidents prompted further refinements. After a 2001 shoe bombing attempt, the TSA made shoe removal mandatory at checkpoints. Following a 2006 plot involving liquid explosives, restrictions were imposed limiting carry-on liquids to 100-milliliter containers. Additionally, the Federal Flight Deck Officer program authorized trained pilots to carry firearms, while full-body scanning technology was introduced to airports.
These cumulative changes have made air travel today fundamentally different from the pre-9/11 era, when passengers could bypass security screening for domestic flights and bring companions to boarding gates. While security procedures remain contentious among travelers, they represent a permanent shift in how aviation balances accessibility with safety measures.
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Originally reported by Aljazeera →
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