Why create a round trip space craft, when you can build and discard two one-way craft for twice the price?<p>(At first I didn't think this could really work, until I realized the second craft could have been towed up by the first.)<p>Incredible kudos to SpaceX, when you consider its comparable competitors repeatedly fumble (Boeing), move slow (Blue Origin), lost their edge (Russia), fidget spinner themselves out of relevance (ULA, Arianespace, Orbital Sciences), whiffed (Sea Launch), or very "successfully" build, launch and discard fortunes (er, flights) for the purpose of justifying those same flights (er, fortunes) (NASA).<p>Kudos to China too for some prolonged and relatively rapid progress. It will be interesting to see how that progress continues given the "Coolish War" we are now in.