tell if if a spacewalk is necessary. one of the cooling stations went out yesterday. they had to shut down noncritical systems. the spags station and the crew, nasa says, is not in danger. still, it's worrisome. john zarrella joins me now from miami. >> reporter: the mission management team is meeting this morning and will have to come up with some contingenciecontingen. they have a con contingency for a spacewalk. they did one back in may to fix a cooling loop. back in 2010 they had to replace one of the two pumps out there on the outside of the space station. in fact, the one that failed yesterday is the one that was used as a replacement back in 2010. now, of course, any time you have to go outside of the space station to do any kind of work, it can be a dangerous situation. but what happened yesterday, of course, was the pump failed. they managed to get it restarted