The Significance of North Korea's Actions

So as our school year finally comes to a close, a new international affair between the U.S. and another foreign nation as North Korea begins. To summarize the story for those who don't already know it, the U.S. teamed up with Seoul South Koreans to investigate North Korean vessels for weapons of mass destruction. North Korea viewed U.S. actions as a major violation of North Korean soveriegnty and will proceede to "respond with a powerful military strike" quotes the spokesman for the North Korean army. They then tested three small nuclear missiles as a demonstration of power.
The U.S. with the help of Obama will try to get international sanctions again tightened on North Korea, but his efforts will mostly be in vain because North Korea blames the U.S. of violating their previous agreements from the Korean war 1950-53. One way to look at it from the North Korean's point of view is an attempt to gain an upperhand on the Obama administration early in his presidency as a means of leverage. This could also be a situation, again, in which the U.S. has dug their nose too deep into other people's business. Although North Korea plans to punish South Korea because they would be overmatched by the U.S., the U.S. still must find a legal path internationally to disarm North Korea. North Korea has also used this incident to get their plutonium plants up and running again to produce a nuclear missile.
I believe that the most effective way to disarm North Korea and weaken their power is for the U.S. to rally every ally they have in the world against North Korea and threaten them with a bigger stick. Any other ideas?