Message posted by Matthew Ruch on June 05, 2012 at 4:06:12 PST:
Slightly but not entirely off-topic, but interesting. The NRO has handed over two spare Keyhole satellites in storage in a cleanroom in Rochester, NY, to NASA, for use as a space telescope. USA 224 was thought to be one of two spare KH's built after the 2005 FIA optical component was axed, but apparently there was yet another one.
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