The us is not raising its terror alert status.

美国目前没有提高反恐警戒线。

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TWO people died when a plane crashed into a New York tower block last night, sparking a big terror alert.

昨晚一飞机撞击一栋纽约大楼发生巨大撞击造成两人死亡。

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He knew his niece was on the island, and he did not want to alert his mother - his niece's grandmother - to the unfolding terror.

他知道他的侄女在岛上，同时他不想告诉他的母亲——他侄女的祖母——他不想引起恐惧。

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The terror alert system, however, was not in effect at the time, but rather, implemented in 2002.

CNN: Experts question U.S. terror alert system

With Europe under an unprecedented terror alert, the U.S. State Department has issued a travel alert, warning of potential terrorist attacks.

FORBES: 10 Secret Service Survival Tips for Travelers

As we've been reporting, in the wake of today's bombings in London, US officials have raised the terror alert level for mass transit systems.

NPR: New York, Los Angeles Step Up Security