Donald Trump described the north as a "rogue nation" which continues to be "very hostile and dangerous to the United States".
South Korea has started live-fire drills to 'strongly warn' its northern neighbour. And the UN Security Council held its second emergency meeting in a week.
But stiff sanctions have already been imposed - without stopping the missiles being launched or the test bombs being detonated.
So, what now? And does a military response risk the beginning of another world war?
Presenter: Jane Dutton | Guests: Isaac Stone Fish - Center on US-China relations; Victor Gao - China National Association of International Studies; Robert Kelly - International relations specialist
