U.S. astronauts on the ISS have to make today unscheduled spacewalk - Radio Echo of Moscow

They will try to detect ammonia leak at the plant.

astronauts have to work as quickly and gently. Ammonia is very toxic and poses a serious threat, even in small concentrations. At the same time, how many astronauts Thomas Mashburn and Christopher Cassidy will be held in the open space, no one knows. The fact that the U.S. segment of the ISS is leaking ammonia, it was learned on Friday night. This gas is used for power station cooling channels that provide electricity ICS. It was reported that the crew saw a small white flakes that floated from one of the sections. However, a leak in this place met before. Last November, the American astronauts and unscheduled spacewalk and successfully eliminated the problem.

Meanwhile, NASA has determined that the plant continues to operate normally, and the crew is not in danger.