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As far as I am aware the International Space Station is currently the largest and most complex international space initiative. Orbital construction of the station began in 1998 and is scheduled to end in 2011. The ISS is estimated to have cost roughly $150 billion which was paid for by the station's five participating space agencies: NASA (National Aeronautics and Space Administration), ESA (European Space Agency), RKA (Russian Federal Space Agency), JAXA (Japanese Aerospace Exploration Agency) and the CSA (Canadian Space Agency).

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15y ago

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