The Missile Defense Agency has approved Lockheed Martin's preliminary design for the Long Range Discrimination Radar -- a program central to Pentagon plans to improve homeland defense by bolstering the Ground-based Midcourse Defense program with an unprecedented ability to detect ballistic missile threats by the end of this decade. The LRDR is a nearly $1 billion project to emplace a new radar in Alaska by 2020 as part of the agency's plans to upgrade the GMD program to what it...