Scott Kelly sets out to break an American record in space

Aired: 3/30/2015 | 0:06:52 | Clip
This week, astronaut Scott Kelly arrived at the International Space Station, where he will stay for a year -- the longest duration of time any American has spent in space. While Scott is in orbit, researchers on Earth will be studying his identical twin brother Mark Kelly for insight into how space affects the human body. Jeffrey Brown learns more from former astronaut Chris Hadfield.

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