U.S. wreckage recovery of the Korean rocket test concluded that North Korea had nuclear warheads

According to South Korea, "Central Daily" reported on April 17, U.S. President Barack Obama on the 16th local time, said in an interview with NBC reporter, North Korea does not have the capability to launch ballistic missiles carrying nuclear warheads. However, the "Daily Beast" on U.S. network media has quoted more than the United States responsible for North Korean intelligence sources as saying the report said North Korea "Galaxy" satellite was launched in December 2012, it had been loaded into the intercontinental ballistic missile on nuclear warheads test.
Reported that the U.S. Navy Korean rocket debris collected, the successful recovery of the front end portion of the Korean rocket. The analysis showed that North Korea launched a rocket front end portion of a conical shape, so that helps rocket smoothly from space back to Earth orbit. Therefore, the actual use of the Korean rocket is likely to ballistic missiles, rather than artificial satellite.
A responsible nuclear non-proliferation matters said: "The launch of the satellite and launch an intercontinental ballistic missile using the same technology and scientific principles," by North Korea launched a rocket wreckage substances and other intelligence combined analysis, we find that can be judged as a missile warhead objects. "
The report also said the United States also collected to be able to demonstrate that North Korea already has the nuclear warhead miniaturization intelligence, intelligence authorities in the United States, South Korea recently to maintain close contact, sharing each other at any time to collect the latest information. However, the response of the Govement of the United States, South Korea intelligence are "unable to confirm" or "not true".