ນັກບິນ ອະວະກາດ ປະຕິບັດງານ ນອກ ສະຖານີ ອະວະກາດ
![Astronaut Mike Hopkins and Astronaut Rick Mastracchio replace a faulty pump on the International Space Station during a spacewalk, Dec. 24, 2013.](https://gdb.voanews.com/ec7c864f-f555-4eca-8c17-d771eaa74770_w1024_q10_s.jpg)
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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.
![Astronauts Rick Mastracchio, top, and Michael Hopkins work to repair an external cooling line on the International Space Station, Dec. 24, 2013.](https://gdb.voanews.com/854827cc-6764-47e4-8c34-31a61bec11ed_w1024_q10_s.jpg)
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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.
![Astronaut Mike Hopkins is seen at the end of the robotic arm on the International Space Station during a spacewalk, Dec. 24, 2013.](https://gdb.voanews.com/04aebd82-c94c-4322-8f56-feed81224ded_w1024_q10_s.jpg)
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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.
![Astronaut Mike Hopkins works outside the International Space Station during a spacewalk, Dec. 24, 2013.](https://gdb.voanews.com/625d1f8e-ebd5-4a0e-a2c9-830d0061c535_w1024_q10_s.jpg)
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Astronaut Mike Hopkins works outside the International Space Station during a spacewalk, Dec. 24, 2013.