The Defense Department is taking a critical next step in its drive to build a space-based missile shield over the United States, inviting a broad array of companies -- including non-traditional defense firms -- to contribute concepts for a potential network of orbital interceptors capable of striking enemy missiles during launch. On April 4, the Missile Defense Agency, in partnership with the Space Force, announced a three-day event from April 30 to May 2 in Huntsville, AL, to brief industry...