that pump contains ammonia making their job even more delicate. about an hour ago we learned they did have some issues when one of the fluid lines carrying the ammonia in the cooling system became tangled. and that line has since been released. so some good news there, but the astronauts did report sighing some ammonia flakes which did get on their space suits. a nasa spokesperson tells cnn there is no real concern, however. the astronauts will have to undergo a decontamination process anyway before heading back inside the space station. that should take care of ta residue. >> and certainly, alina, we know about the importance of things staying cool when you're around electronics. we deal with that in television because we're around so many things that are electronic. often we complain about how cold our working environment is. much bigger deal obviously if you are in space. so this is really sidelined a lot of business of the space station. what will they be doing once things get back to normal after