Speaking in Beijing today, Kerry said he believed an Iran agreement could have "a positive influence" on North Korea, because it would show that giving up nuclear weapons improves domestic economies and ends isolation. He stressed, though, there was no way to tell if North Korea's reclusive leadership would be able to "internalize" such a message.
International negotiators are rushing to finalize a nuclear deal with Iran by the end of June. Nuclear talks with North Korea have been stalled for three years as the North has continued atomic tests and other belligerent behavior.