 North Korea claims it successfully test-launched a missile yesterday with multiple warheads. NPR's Anthony Kuhn reports from Seoul this contradicts South Korea's claim the test failed and the missile blew up in mid-flight. The Korean Central News Agency claims the missile released three warheads, which were then guided to hit different targets. The report said the test was a step towards developing multiple independently targetable reentry vehicles, or MIRVs, which are harder to defend against than missiles with just one warhead.