It shall be unlawful for any person to deface, injure, knock down or remove any official traffic sign placed or erected as provided in this chapter.

任何损坏外观，破坏，打倒或删除按照本章要求放置的任何官方的交通信号都属于非法行为。

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Meanwhile, Hank Krakowski, the FAA official in charge of operating the air traffic control system, resigned Thursday.

同时，联邦航空部负责飞行交通控制系统的Hank Krakowski在周四辞职。

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A second airport in Beijing is expected to start construction within this year to ease the traffic pressure on the capital airport, a senior official said.

一名高级官员称，北京第二个机场预计将于年内动工建设，以缓解首都机场的交通压力。

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No, said Melvin S. Davis, top NextGen official at the National Air Traffic Controllers Association union.

CNN: Can technology fix the FAA's air traffic troubles?

The accident happened in an area which is not under air traffic control, a FAA official who did not want to be identified discussing the details of the accident told CNN.

CNN: STORY HIGHLIGHTS

An official who heard tape recordings of the radio traffic from Flight 1549 reported the pilot was extraordinarily calm during the event.

CNN: Pilot praised for 'masterful' landing