U.S. Sen. John McCain (R-Ariz.) took to the Senate floor Dec. 16 to blast the Senate Appropriations Committee for eliminating restrictions Congress imposed last year on the Pentagon’s use of Russian-built RD-180 rocket engines.

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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...