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STS-400 LON (Launch On Need)

19 Apr 2009, 02:42 UTC
STS-400 LON (Launch On Need)
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There are two shuttles on two pads at KSC now. Atlantis is in preparation to launch on the final Hubble service mission on May 12 (STS-125), and Endeavour has been rolled out to serve as the rescue shuttle in the unlikely event that Atlantis is unable to return from orbit (due to heavy thermal tile damage or some other major problem). This would be STS-400 LON "launch on need," and it's needed

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