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Is that why SLS launches cost billions of dollars?

• rbanffy 3y ago
  No. That’s because the SLS was the safe bet, planned at a time when what SpaceX does was considered impossible. SpaceX was unlikely to succeed and it’d be irresponsible for NASA to not have a human rated launcher in case SpaceX failed. Also, it keeps a lot of rocket scientists current, sharp, and happily employed while it prevents them from considering moving to North Korea.