Boeing and Northrop Grumman will progress to the technology-maturation and risk-reduction phase of the Ground-Based Strategic Deterrent competition under contracts worth more than $300 million apiece, the Defense Department announced Monday. Northrop, which received a $328.6 million contract, and Boeing, which received a $349.2 million contract, will refine the details of their proposals to replace the Air Force's Minuteman III intercontinental ballistic missiles. Work under the TMRR contracts -- including prototyping -- will run until Aug. 20, 2020, and the...