Space shuttle, as derp as it was, reused its main engines. Utterly retarded SLS is going to use real shuttle engines, cannibalized from actual shuttles...and discard them to be burned up in atmosphere / dumped in ocean. https://youtu.be/O7bzJbVzdVk
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Yup, found it..."In 1999, NASA removed the forward assemblies from each SRB attached to the Pathfinder stack. "
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"Although the SRBs are recovered and reused after each flight, several of the forward assemblies had been damaged or lost over the history of the Space Shuttle program necessitating requisition of those attached to the Pathfinder."https://en.wikipedia.org/wiki/Space_Shuttle_Pathfinder …
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