We went from a NASA that flew THREE different spacecraft (4 if you count the LM) between 1961-69 to a NASA that hasn’t put anyone into space on their own system since 2011.
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Reminds me of the Feynman story about painting 4 lines on the shuttle SRBs to make bolting their segments together easier (bolts are tightened in specific sequence). The cost would be immense, because all the manuals would have to be changed. So, no painting.
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