For the third time in nine months, a defendant in a lawsuit challenging the U.S. Air Force’s $11 billion bulk purchase of rockets from United Launch Alliance are asking a federal judge to dismiss the case.

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Mike Gruss is the chief content and strategy officer at SpaceNews. From 2013 to 2016 he was a senior reporter at SpaceNews covering military space. Previously, he was editor in chief of Sightline Media Group and worked as a reporter and columnist for...