"There are identifiers of people who have hostile intent that you can pick up," says Kip Hawley, the head of America's Transportation Security Administration.

“怀有可获得的敌意的人有可被识别的特征，”美国运输安全管理部门主管Kip Hawley如是说。

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Kip Hawley is a former head of the U.S. Transportation Security Administration, or TSA,which is charged with screening airline passengers and luggage.

VOA: standard.2009.12.30