An aerial shot shows two of the barges being moved into position
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A controlled deorbit requires the use of several core systems, including those for communications, power, and avionics. Some of the ISS machinery was not specifically certified to perform in a depressurized environment. (NASA believes that critical systems would remain operable, based on technical analyses, and emphasizes that many of these systems are already used in vacuum.) Another thing to worry about: the ISS losing control over its orientation in space. The spacecraft could start tumbling, flipping the station’s solar arrays away from the sun, taking the primary source of power with it.
清晨7点，潮白河大桥上车流不息。家住河北省廊坊市大厂回族自治县、在北京市上班的李彤晖驶上厂通路，约40分钟后抵达单位。“以前上班得绕行武兴路或走京哈高速，不仅远，交通高峰期还特别堵。”李彤晖说，自从厂通路通车后，通勤时间缩短了近半小时。