Northrop Grumman and Raytheon Technologies are pitching a Next-Generation Interceptor design backed by what they say are engineering teams with unparallel experience knocking down targets in space and knowledge of today's Ground-based Midcourse Defense system -- promising a unified, "seamless" corporate team to deliver a new booster and kill vehicle as if from a single company. Until now, the two companies have said little about their NGI efforts beyond a May announcement that they planned to join efforts for the...