False ammonia leak alarm causes evacuation of US portion of ISS


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A false alarm on ISS early this morning, signaling the leak of ammonia coolant, forced the evacuation of the American portion of ISS.

American engineers are assessing the cause of the alarm, though they seem pretty confident now said that no leak of any ammonia took place and the problem was likely caused by a faulty sensor.

Update: The crew has now returned to ISS.

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