What's going on with Kim Jong Un and his daughter?

We think she's 10 years old and we think we know her name, but those details are only known because of the former basketball player Dennis Rodman after he spoke to a newspaper a decade ago revealing the identity of the North Korean leader Kim Jong Un's youngest daughter.

She has now been seen in public in North Korea at military events and parades, but why has Kim Jong Un decided to bring her out now?