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ISS038-E-019439 (21 Dec. 2013) --- Seen near the hatch to the Quest airlock, NASA astronaut Rick Mastracchio watches as crewmate Mike Hopkins has only his legs and feet showing during the initial Expedition 38 spacewalk designed to troubleshoot a faulty coolant pump on the International Space Station. Four crewmates representing Roscosmos and the Japan Aerospace Exploration Agency remained inside the orbital outpost during the work. JAXA's Koichi Wakata operated the station's remote manipulator system or Canadarm2 for the two.
