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Another way of saying this is that NASA will take exquisitely developed reusable rocket engines, use them once, and drop them forever into the drink. “My God, you can't do that very often unless you've got a lot of money," Chris Kraft once told me.https://twitter.com/NASA_SLS/status/996804981750665216 …
clearly, spending $10 billion to develop a rocket to safely dispose of 16 old rocket engines is solid plan.
Well, the first plan was to air start them on the second stage of Ares 1. That would have covered 16 flights, at least.
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