"The End" Of Kim Jong Un? What The 'Washington Declaration' Means

The Washington Declaration boosts the US nuclear umbrella over South Korea.

If North Korea uses its nuclear weapons against the United States or its ally South Korea, it would be "the end" of Kim Jong Un's regime, Seoul and Washington announced this week.

The stern threat comes as President Yoon Suk Yeol is on a six-day state visit to the United States, where he and his counterpart Joe Biden discussed ramping up the US security shield for South Korea in the face of the nuclear-armed North's increased missile tests.

But how significant is the tough-sounding statement? AFP takes a look at what we know:

What is it?