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It kind of feels like the space programs have the best preparation, the best-trained people like you and the greatest, most committed people. but sometimes you have to be macgyver in space. >> that's true. >> it didn't work the way it was supposed to work and you have to do something else. is that what they're doing? trying to figure out the thing they're going to do to loosen whatever they need to get out? >> well, in general that's true. but in this case, that's not what happened. they did finally get the four hoses off and i think it was trying different things, as you say. a little bit of ...

And what happens if they don't get it done? >> as you were saying, this is a critical repair because this takes down 1 of only 2 cooling loops on the u.s. segment. what they're doing, the pump module failed. it's pretty simple. disconnect the hoses that go to the failed pump unit, take it out and replace it with another one and replace the hoses. but the difficulty they ran into on the last eva which ran a little over eight hours, which is a record for the duration of a space station eva and almost up there for the all-time record, they found the hoses were difficult to remove off the failed p...