valve that s in this big pump module. in toward get the two loops back up again, they were flying with one loop but if you lose the last one you are out of luck cooling wise. so they want to bring that second loop back up and tried lots of creative things and the only solution they were left with was to go out and do these space walks to change out the pump module and that s going pretty well. they almost are done. they will to be done in a couple more hours and have another loop up and working sponsorship it s very important but looks like it s going pretty well for them so far. clearly this is a device that basically keeps the space station cool both inside and out. they did have to suspend some of the science research they were working on. you know, you look at what s going on out there, and it s difficult for most us to repair things without wearing those space suits. yeah. how difficult is it for them. what is their mindset right now?