US Space-Based Missile Warning System Achieves Key Milestone

US Space-Based Missile Warning System Achieves Key Milestone: "The U.S. Air Force/Lockheed Martin team developing the Space-Based Infrared System (SBIRS) program has achieved two key milestones: a testing milestone demonstrating that the ground system is on track to support launch of the first SBIRS geosynchronous (GEO-1) satellite in the constellation, and a maturity milestone moving the ground system into the next level of integration."