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Airlines security policies post 9/11

Explosives Detection Technology In the late 60s, X-ray machines were introduced to prevent airplane hijacking. After Sept. 11, 2001, the rules and regulations became more stringent. Today, X-ray explosive detectors and scent detectors are used to detect threats in passengers' baggage and trace levels of explosive materials.
Globe Staff Photo / Wendy Maeda
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Explosives Detection Technology

In the late 60s, X-ray machines were introduced to prevent airplane hijacking. After Sept. 11, 2001, the rules and regulations became more stringent. Today, X-ray explosive detectors and scent detectors are used to detect threats in passengers' baggage and trace levels of explosive materials.