Though air marshals never fly without at least 1 partner, as passengers board, Tom scans for potential allies.

空中警卫一般是不单独飞行的，所以当乘客上机后，汤姆就会开始讯速搜寻可合作的伙伴。

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Still, Pew researchers said that percentage represents as many as 19 million potential airline passengers.

CNN: Survey: Shock from terror attacks receding

Motorists and train passengers across West Yorkshire are being warned of potential disruption as snowfall and freezing temperatures are forecast.

BBC: Snow prompts West Yorkshire travel warning