Astronauts Fix Pump at the International Space Station
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Astronaut Mike Hopkins checks out the spacesuit he will be wearing on a spacewalk at the International Space Station, in this undated handout photo from NASA.
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Flight engineers Michael Hopkins and Rick Mastracchio perform a series of spacewalks outside the International Space Station in this Dec. 21, 2013 still image taken from a NASA handout video.
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Astronauts Michael Hopkins and Rick Mastracchio perform a series of spacewalks outside the International Space Station in this Dec. 21, 2013 still image taken from a NASA handout video.