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U.S. Air Force Solicits Information on New Rocket Engine

On the same day two Russian-made RD-180 rocket engines arrived in Alabama from Moscow, the U.S. Air Force issued a request for information on the possibility of weaning itself from those very...


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Two of the asteroids on NASA's short list of targets for the Asteroid Redirect Mission are not like the others. SpaceNews reporter Dan Leone explains. 

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