The Senate Armed Services Committee would be more likely to fund an additional radar on the East Coast to guard against a missile attack from Iran rather than build a third ground-based interceptor site, two committee staff members said Dec. 15.

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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...