TOKYO (AP) — According to its official statements, North Korea is ready to go to the brink. But how serious are Pyongyang's threats?

This week, new U.N. sanctions punishing the North's successful December rocket launch have elicited a furious response from Pyongyang: strong hints that a third nuclear test is coming, along with bigger and better long-range missiles; "all-out action" against its "sworn enemy," the United States; and on Friday, a threat of "strong physical countermeasures" against South Korea if Seoul participates in the sanctions. Click here to read more of this article.

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