The U.S. Defense Department is warning that some of the proposals contained in the House and Senate versions of the pending defense authorization bill for 2015 would delay and otherwise hinder the Air Force’s efforts to reshape its space portfolio.

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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...