On the cost effectiveness of commercial space

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The SpaceX Falcon-Dragon transportation system arguably represents the best investment NASA has ever made… The stunningly low-cost Falcon-Dragon system
represents much more than a rare bargain for taxpayers, in an era when
most such stories have a very different ending. It offers indisputable
proof that a new approach to space transportation can work far more
effectively than the old ways. It’s absolutely vital to keep the company
and the space transport system which has pioneered this path in the
vanguard.