Olympic diplomacy earns gold for North Korea

North Korea has emerged as the winner of one of the Winter Olympics' most important medals: the diplomatic gold.

That has been the assessment of political analysts as the North Korean delegation lead by Kim Jong Un's sister headed home last night.

A charm offensive even included an offer of a possible summit to end decades of hostilities.

The delegation capped its final day in South Korea by joining South Korean President Moon Jae-in at a Seoul concert of a visiting North Korean art troupe.

But not everyone has been won over. Protesters have expressed anger at what they said was the North using the Games to drive a wedge between South Korea and its ally the United States.

Washington says it is watching with interest to see if the diplomacy leads to firm negotiations.