Old news but being reiterated today; North Korea has between five and eight nuclear warheads. This is according to Daniel Pinkston, of the International Crisis Group, who quotes un-named agencies (but probably the US). The missiles can be loaded onto Rodong missiles capable of reaching Japan. If true, Japan may go nuclear, too.
(H/T). US Congressional report here (16-page PDF).
Is this one of the international crises Biden was referring to?
One query: the first link in this post is from 2006, and quotes US sources. The second link quotes un-named sources. Anything to declare, President Obama?