printer they have on the iss. it's the first uplinked tool print 234d space. a former astronaut spoke with a colleague of mine, michael holmes, about this technology and the developments. >> when you're making 3-d printed parts one of the things we have to be concerned about is is the part made, suitable, because it's got to pass the quality checks we would have for a critical component. obviously for a hand tool, like a ratchet we wouldn't need that. but 3-d printers have been used to make rocket components. on my particular mission what we could have used was a can opener. can openers were wearing out and we had to resort to using our pocket knives and had to wait till the next reply ship showed up with new can openers before we could effectively open our cans again. >> unreal. how about that? we'll leave on that note. thank you for watching.