The Pentagon using a new Raytheon Co -built interceptor missile downed a target missile in a high-stakes test of systems designed to thwart what experts say are advancing capabilities of countries like North Korea and Iran. The mission off Hawaii late Tuesday was against a medium-range, separating ballistic missile, the Pentagon\'s Missile Defense Agency said. The mock warhead separated from the target\'s booster section, presenting what is supposed to be a more \"threat-representative\" and challenging attack scenario.