The Defense Department has markedly curtailed what last year was a $1.4 billion five-year investment plan for a pair of programs -- the Common Kill Vehicle and the Multi Object Kill Vehicle -- that promised to deliver next-generation warheads for future ballistic missile defense in a decade. The Missile Defense Agency's fiscal year 2020 budget request overhauls these two programs so dramatically that the agency zeroed out the MOKV program -- which was forecast in FY-19 to require $34 million...