Chris Austin Hadfield, OOnt CD, (born August 29, 1959) is a Canadian retired astronaut. He was the first Canadian to walk in space. He has flown on two space shuttle missions and has also served as commander of the International Space Station which made him the first Canadian to serve as commander of the International Space Station when he lead Expedition 35 after launch on 19 December 2012. He was previously a Royal Canadian Air Force fighter pilot.