一项针对飞机乘客的调查发现，超过 20% 的乘客曾故意或非故意夹带非法物品通过美国运输安全管理局检查站登机，其中至少有 6% 的乘客非故意携带违禁刀具或其他带刃物登机。
A survey of airline passengers found that more than 20 per cent had knowingly or unknowingly smuggled prohibited items past the US Transportation Security Administration checkpoints onto the aircraft, including at least 6 per cent who boarded the plane while unintentionally carrying prohibited knives or other bladed objects.