Welcome to today’s space briefing -- a biweekly roundup of national security space news. Top Story MDA completes review of HBTSS prototype designs; L3Harris, Northrop cleared to build The Missile Defense Agency has approved the second of two competing design proposals for a Hypersonic and Ballistic Tracking Space Sensor, clearing L3Harris to proceed with Northrop Grumman in beginning to fabricate space vehicles critical to U.S. military plans to counter a new class of ultra-fast maneuvering weapons. News & Notes Northrop-Ball...