NATIONAL  ·   December 24, 2013

Timelapse: Astronaut's 'sleigh ride' through space

- NASA astronaut Mike Hopkins transports the spare ammonia pump as he repairs the cooling system on the International Space Station during a spacewalk Tuesday. ()

- NASA astronaut Mike Hopkins transports the spare ammonia pump as he repairs the cooling system on the International Space Station during a spacewalk Tuesday. ()

Timelapse: Astronaut's 'sleigh ride' through space (1:13)

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