Would you be willing to commit NASA to a human Mars expedition?
There has been a plan on the table since the early 1990s called "Mars Direct" that provides a detailed mission architecture for landing humans on Mars within a decade or less at a total cost of roughly $30 billion. This works out to just $3 billion per year - roughly the same as we spent annually on the recently retired Space Shuttle operation in Low Earth Orbit.
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Willis Shirk
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