Lopez : Uranium - 235 blast would pose new threat to U.N. Security Council . Indicates Pyongyang has advanced centrifuge technology and related systems . North Korea 's young leadership seems to care little about what U.N. or China think . Product - based sanctions may stifle the North 's efforts to continue nuclear program .
Lopez : Uranium-based blast would pose new challenge to U.N. Security Council . Indicates Pyongyang has advanced centrifuge technologies and related systems . North Korea 's young leader appears to care little about what U.N. or China think . Product-based sanctions may stifle the North 's ability to continue nuclear program .