Welcome to today's Space Briefing -- a biweekly roundup of the latest national security space news. Top Story STARCOM planning team crafting future space test and training range architecture roadmap NATIONAL HARBOR, MD -- The head of Space Training and Readiness Command told reporters a new operational planning team recently began work to flesh out a five-to-10-year architecture roadmap for a new National Space Test and Training Range. News & Notes Space Force announces first tranche of Army, Navy units...