The heightened security comes after a 23-year-old Nigerian man, Umar Farouk Abdulmutallab, allegedly tried to detonate explosives on a Northwest Airlines plane December 25 as it approached Detroit.
美国加强机场安全措施是因为23岁的尼日利亚男子阿卜杜勒穆塔拉布涉嫌在12月25日试图在西北航空公司飞机飞行接近底特律时引爆炸药。
Abdulmutallab has been known to federal authorities for at least two years and had been on a terror watch list compiled by the U.S. National Counterterrorism Center.
联邦机构已经掌握Abdulmutallab的情况有2年的时间了，并将其列在美国国家反恐中心的恐怖观察名单上。
US grand jury has indicted Nigerian Umar Farouk Abdulmutallab on six counts over an alleged plot to bomb a plane over Detroit on Christmas Day.
一个美国大陪审团控告尼日利亚人乌马·霍鲁·阿卜杜勒六项罪名，他曾密谋在圣诞节当日炸毁飞往底特律一架班机。
On Christmas Day, Nigerian national Umar Farouk Abdulmutallab attempted to blow up the Northwest Airlines flight he was sitting on as it approached Detroit Metro Airport.
去年圣诞节当天，一名名叫阿卜杜勒?穆塔拉布的尼日利亚男子搭乘美国西北航空公司的航班飞往底特律途中企图炸机未遂。
But he conceded that the nation's counterterrorism defenses' didn't work 'on the day of the attempted attack by Mr. Abdulmutallab.
不过他承认，美国的反恐防御体系在炸机事件发生的当日并没有发挥作用。
But he conceded that the nation's counterterrorism defenses' didn't work 'on the day of the attempted attack by Mr. Abdulmutallab.
不过他承认，美国的反恐防御体系在炸机事件发生的当日并没有发挥作用。
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