y la cosa acabó así:
desde 2001 USA sale al espacio en naves rusas:
US 'forced' to hitch rides with Russia to space station, says NASA chief
NASA really doesn
NASA buys $490 million Russian rides to ISS as funds fall short
https://www.space.com/20897-nasa-rus...ches-2017.html
http://www.dw.com/en/us-astronauts-w...aft/a-18632058
El Challenger, Richard Feynman y la verdad tras el desastre
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