The Pentagon's "fly-before-you-buy" plan for the Next Generation Interceptor calls for procuring 11 prototype guided missiles, flying six against ballistic missile targets and utilizing the remaining five for ground tests as well as possible do-over launches in an effort to field by 2027 an improved homeland defense shield against a potential North Korean nuclear strike. The Missile Defense Agency’s estimated $13 billion project to develop a follow-on weapon to the current Ground-based Interceptor is scheduled to pivot to initial production...