Astronauts Rick Mastracchio, Koichi Wakata and Jeanette Epps

NASA astronaut Rick Mastracchio (right), Expedition 38/39 flight engineer; and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata (center), Expedition 38 flight engineer and Expedition 39 commander; along with NASA astronaut Jeanette Epps participate in a space station EVA planning and preparation session in an International Space St

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