The aging craft, heading toward the Strait of Malacca, is an unlikely player in what is fast becoming an international drama.
The missile defense system deployed in Kauai in response to North Korea worries has been tested successfully several times, but never in combat.
In South, decisive tone of 'joint vision' is seen as sending a strong message to the North.
Other countries, too, are part of the effort to block the transport of nuclear materials.
The international community will not back down in the face of North Korea's threats, the US president says at a White House meeting Tuesday.
For the first time, the rogue state has admitted to having a uranium-enrichment program. It also threatened to respond militarily to any attempts to stop any of its ships suspected of carrying nuclear components.
The apocalyptic pronouncements from Pyongyang have a silver lining: They may be motivating the world to take unprecedented action against the North.
Even if China doesn't follow through on its vote for economic sanctions, the UN resolution approved Friday may let other countries tighten the screws.
But the two women sentenced to 12 years in prison still face awful conditions. Their whereabouts since last week remain unknown.