A test of the ground-based midcourse defense (GMD) system could not be completed early today after the interceptor and booster rocket failed to separate, the Defense Department announced. A modified Minuteman II ICBM carrying a target warhead was successfully launched from Vandenberg Air Force Base, CA, at 12:26 a.m. PST, and the booster rocket carrying the Exoatmospheric Kill Vehicle was launched about 20 minutes later from Kwajalein Atoll in the Republic of the Marshall Islands. "Initial post-test analysis indicates that...