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Originally planned to launch on this day but had technical problems for faulty engine.
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Took first flight called STS-41-D to deploy 3 communication satellites.
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Discovery carried the Hubble Space Telescope into space during mission STS-31
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Provided the second servicing mission for the HST
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Provided a third maintenance service to the telescope.
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Discovery became the first orbiter to undergo Orbiter Major Modification at Kennedy Space Center.
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Launched to the ISS and docked with the crews