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astronauts toured the new International Space Station on Thursday, 10 December 1998, entering the Unity and Zarya modules for the first time, and establishing an S-band communications system that enables U.S. flight controllers to monitor the outpost's systems. Reflecting the international cooperation involved in building the largest space complex in history, Commander Robert Cabana and Russian Cosmonaut Sergei Krikalev opened the hatch to the U.S.-built Unity connecting

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