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https://www.denverpost.com/2016/02/26/sierra-nevadas-dream-chaser-derived-from-lost-soviet-space-plane/ https://www.denverpost.com/2016/02/26/sierra-nevadas-dream-c... https://www.popularmechanics.com/space/a19029/nasas-next-gen-iss-ship-is-a-decades-old-soviet-project/ https://www.popularmechanics.com/space/a19029/nasas-next-gen... https://arstechnica.com/science/2016/01/nasas-newest-cargo-spacecraft-began-life-as-a-soviet-space-plane/ https://arstechnica.com/science/2016/01/nasas-newest-cargo-s...