Ground controllers used the International Space Station’s Canadarm2 robotic arm to move the Pressurized Mating Adapter-3 (PMA-3) from the port side of the Tranquility module to the space-facing side of the Harmony module March 26. The relocation of PMA-3 places it in the correct position for the future installation of the second of two International Docking Adapters to which U.S. commercial crew spacecraft will dock in the years ahead. Electrical and data cables will be connected between PMA-3 and Harmony on March 30 during a spacewalk by Expedition 50 crew members Shane Kimbrough and Peggy Whitson.
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