It's hard to generalize.
The reason it's hard to get to orbit isn't that space is high up -- it's because you have to go so fast. https://t.co/ZcAdtUFMbd — Douglas Allen (@DouglasHAllen) October 22, 2017
The reason it's hard to get to orbit isn't that space is high up -- it's because you have to go so fast. https://t.co/ZcAdtUFMbd
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