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The next step in growing a robust commercial market in low-Earth orbit and preparing the International Space Station for the future arrival of U.S. commercial crew and cargo vehicles will be undertaken on Wednesday, May 27. The large Permanent Multipurpose Module (PMM) that is used as a supply depot on the orbital laboratory will be detached from the Earth-facing port of the Unity module and robotically relocated to the forward port of the Tranquility module using the space station's robotic arm, Canadarm
