Lopez : Uranium-based blast would pose new challenge to U.N. Security Council . Indicates Pyongyang has advanced centrifuge technologies and related systems . These dilemmas confront the permanent five members of the Council with a harsh reality check regarding their unity of action and what message to convey to the north via what particular sanctions . Comment: Product-based sanctions may stifle the North 's ability 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 . Comment: Product-based sanctions may stifle the North 's ability to continue nuclear program .