(Explorer8939) wrote in
m:

Johnson Space Center wants to use 2 Shuttles for a
servicing mission, one for the prime mission, one as a backup in case
the first Shuttle has problems inflight and the crew needs to be
rescued.

Incorrect. JSC is *studying* the option of a rescue shuttle in the even
that GSFC *wants* an HST servicing mission before the shuttle program has
standalone repair capability. JSC does not *want* to use a rescue shuttle;
it would *prefer* to delay the next HST servicing mission until standalone
repair capability is available.

I've explained this to you before. You seem to be pretty clue-proof.

--
JRF

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