Space station cooling system leaking

The International Space Station has a radiator leak in its power system, but no crew members are in danger and the station is operating normally, the US space agency NASA said on its website.Crew members at the orbital outpost spotted white flakes of ammonia floating away from the space station at about 1330 GMT on Thursday, NASA said, and fixing the leak might require that a portion of the station's cooling system be shut down for about 48 hours.