chris came up halfway through chris hatfield's tenure.is hatfield became an international sensation because of his guitar playing and his downlinks to students in the classroom and everything else. chris will go home about halfway through luca's tenure. >> you look back and you say you think the job you have now is the best. talk about this. we have some video of you over the four trips you took on the space shuttle. >> yes. >> which shuttle were you on? i was on columbia, my first flight. >> you can comment. >> probably on columbia with now senator bill nelson, as a matter of fact. that was my very first flight into space. it was a flight immediately prior to challenger. we lost the challenger 10 days prior to this landing. my second and fourth flights were on discovery. e second was when we doe employed the space telescope. then my third flight, which was the first time i was actually the commander on a mission, that's a hubbel crew right there, with dr. kathy sullivan who is now the acting administrator and was america's first woman to

chris came up halfway through chris hatfield's tenure.eld was the canadian who became an international of his guitar se playing and the outreach of students to the downlinks to classrooms and everything else. chris will go home halfway on the luka's tenure international space station. >> you said earlier you don't look back and you think the job is the best. talk about -- we have video of that youthe four trips took on the space shuttle. which shuttles were you on? i was on three -- "columbia" my first flight. >> you can comment. that's probably on "columbia" now senate bill nelson. space.my first flight to we lost the "challenger" ten days after this landing. flightings ourth were on discovery. second was when we deployed the hubble space telescope. last time was the joint russian-american mission. the third flight, the first time a as on a commander on mission, that's the hubble crew right there with dr. kathy ullivan, now the acting new administrator and america's first woman to walk in space. treadmill.on the everybody says it's absur

. ♪ >> that is chris hatfield singing in space.f his many youtube video that is became a hit here on earth. >> every time i see it, it's fantastic. >> he got back a few months ago from his latest stint in space. >> he's also known for sharing his views of the planet on social media. he recently came back to this planet for good. ♪ >> he found a way to rock out out in space. >> it's an incredible existence living on a space station. you work hard but you have the opportunity to play a little bit. >> even before the canadian astronaut floated to nearly 17 million youtube hits, he was a social media celebrity. >> they soak up water nicely. i have a nice, wet toothbrush. he showed what life is really like in orbit, everything from how they make sandwiches, wash their hands and shave. >> my moustache needs extra attention. >> i try to be myself. it occurred to me, if i saw something i thought was cool or funny, other people would, too. >> reporter: he always dreamed of becoming an astronaut, even as he grew up on a farm in ontario. he s