After two test failures and a subsequent two-year hiatus, the United States' primary missile defense system passed a key flight test Jan. 26 at Van-denberg Air Force Base, Calif., and is a step closer to attempting once again to intercept ballistic missiles. The most recent test of the Ground-based Midcourse Defense system by the U.S. Missile Defense Agency focused on the Exoatmospheric Kill Vehicle (EKV) Capability Enhancement 2, a crucial component of the missile shield that has proved problematic in the past.
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