Travel Without Moving - Korean Demilitarized Zone

Continuing the travel without moving series, the Korean Demilitarized Zone remains a hot spot with North Korea publicly stating its ambtions of joining the nuclear club. How big of a threat is the statement anyway? I believe it's a desperate move from the North Koreans' side, while trying to put itself on the world's map again -- and the news of course. What they lost was the momentum, one that