Kim Jong Un's mysterious sister, Kim Yo Jong, issued a rare public threat to the US on her brother's behalf, hinting that she might be gaining influence

Tech Insider
A tv screen shows a file image of Kim Yo Jong, the sister of North Korean leader Kim Jong Un, during a news program at the Seoul Railway Station in Seoul.
A tv screen shows a file image of Kim Yo Jong, the sister of North Korean leader Kim Jong Un, during a news program at the Seoul Railway Station in Seoul.

KIM Jae-Hwan/SOPA Images/LightRocket via Getty Images

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