Challenger, Columbia shuttle disasters informed decision to send Starliner home uncrewed, NASA says - Space.com
- Challenger, Columbia shuttle disasters informed decision to send Starliner home uncrewed, NASA says Space.com
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- Boeing Starliner astronauts will spend at least 240 days stuck in space — is that a new record? Livescience.com
- How will Nasa return two US astronauts stranded in space? Financial Times
- NASA will fly Boeing Starliner crew home with SpaceX, Calamity Capsule deemed too risky The Register