- The US said it might "interdict" North Korea's maritime traffic.
- Pyongyang called it a "big step" towards nuclear war.
- North Korea always makes grand threats, but a naval blockades have led to war in the past, and would likely require violence to enforce.
After North Korea's latest missile test, Secretary of State Rex Tillerson called on all nations to clamp down on the rogue regime and reasserted the US's "