The chest thumping between Washington and Pyongyang should worry us all.
North Korea's in our wider neighbourhood and the dictatorial regime there has always been an irritant since the Koreas were divided, without resolution in the 1950s.
Going to the demilitarised zone on the 38th parallel is a freaky experience.
Western visitors can stand on a platform and look across to the North at the binoculars watching them.
On the odd occasion it's become unbearable for the soldiers looking into the west from the severely deprived North that they've defected, although that's rare.