Obviously it's not trivial, since they already flew a few spaceships and rockets, but it could be an edge case not considered until now which can still be fixed, rather than a "well, it turned out to be impossible to fly a rocket with this design".
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Obviously it's not trivial, since they already flew a few spaceships and rockets, but it could be an edge case not considered until now which can still be fixed, rather than a "well, it turned out to be impossible to fly a rocket with this design".