think of it like a radiator on your car are indicating there's a problem. engineers don't know if it is a software or a hardware problem. but the only way to fix it may be a space walk like the one we saw in the movie "gravity" to diagnose it. mission control has already shut down three sections of the space station. if the problem can't be fixed and a second cooling system fails the worse-case scenario nasa would consider evacuating the station completely. right now there are six crew members on the station from the u.s., japan and russia. the most recent occupants arrived in november and were scheduled to stay until march of next year. engineers are working to make sure they don't have to come home early. clayton sandell, abc news, denver. breaking news overnight from hawaii. one person has died in the crash of a small plane off of the island of molokai. our affiliate in honolulu says it was the director of the hawaii health department,