ນັກບິນ ອະວະກາດ ປະຕິບັດງານ ນອກ ສະຖານີ ອະວະກາດ

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Astronaut Mike Hopkins and Astronaut Rick Mastracchio replace a faulty pump on the International Space Station during a spacewalk, Dec. 24, 2013.

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Astronauts Rick Mastracchio, top, and Michael Hopkins work to repair an external cooling line on the International Space Station, Dec. 24, 2013.

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Astronaut Mike Hopkins is seen at the end of the robotic arm on the International Space Station during a spacewalk, Dec. 24, 2013.

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Astronaut Mike Hopkins works outside the International Space Station during a spacewalk, Dec. 24, 2013.