Nasa astronauts repair International Space Station – video
by Guardian Staff from on (#YCGW)
Nasa astronauts Scott Kelly and Tim Kopra venture outside the International Space Station on Monday for an unplanned spacewalk to fix a stuck railcar used by the station's robotic arm. The surprise spacewalk started at 12.45pm GMT and was expected to last for three hours. This is the 191st spacewalk to repair the space station
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