I don’t think that it is “challenging” in terms of technical capacity the same that it was fifty years ago. Back then, the concern was whether or not we could actually build rockets that successfully brought astronauts to the moon and could bring them back. Today the challenge is more monetary and convincing policymakers that sending people to the moon is worth it. Especially in light of the economic recession, it is challenging to convince lawmakers that they should allocate large portions of funding to walk on the moon when the vast majority of their constituents probably won’t see immediate benefits.
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