Opinion: The Challenger disaster, 40 years on, and the speech that consoled the nation

We do not have to hide from the hard things. The call of Americans is not to look away, but to look up.
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NASA modifies Dream Chaser ISS cargo contract as Sierra Space shifts to defense work

Sierra Space’s Dream Chaser will now conduct only a free flight demonstration mission under a NASA cargo contract. Credit: Sierra Space WASHINGTON — Sierra Space and NASA have sharply revised a ...