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They've done it 22 times. https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_Heavy_launches https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_He

• mulcahey 7y ago
  He means 4th reuse of _the same booster_. Not the 4th reuse of any and all Falcon 9s (if that's what you were getting at).
  • thinkcontext 7y ago
    > Thought reuse was still conceptual This reads that he was unaware that they were reusing at all.