It crashed after being asked by the air traffic control tower to bank around before landing.

飞机坠毁之前，空中交通控制塔台让它调整飞行角度后再降落。

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Air traffic control tower (ATCT) - An ATCT is located at every airport that has regularly scheduled flights.

机场管制塔台(ATCT) -有正规航班的每一个机场都有空中交通管制塔台，即地面指挥控制中心。

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The aircraft door has been closed, but there is a lot of traffic now, so we have to wait for the clearance from the air traffic control tower.

我们的飞机虽然关门了，但这时候起飞的飞机比较多，我们还需要等待塔台部门的指挥。

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And,the air traffic control tower suggests a minaret that can be found on a mosque.

VOA: special.2011.04.01

By the runway, a brand new air traffic control tower needed to be built.

BBC: NEWS | UK | Mammoth Heathrow project fuels pride

But some security researchers imagine a less sensational, if equally troubling possibility: Hundreds or thousands of aircraft radioing their approach to an air traffic control tower, and no way to sort through which are real and which are ghost plane signals crafted by a malicious hacker.

FORBES: Next-Gen Air Traffic Control Vulnerable To Hackers Spoofing Planes Out Of Thin Air

Petersburg airport's air-traffic control tower, which then notified Tampa International Airport, Tampa police said.

CNN: Police: Tampa pilot voiced support for bin Laden