About the Author
Colin Zwirko
Colin Zwirko is a Senior Analytic Correspondent for NK News based in Seoul. Follow him on Twitter @ColinZwirko.
North and South Korea both tested ballistic missiles just hours apart on Wednesday, with South Korean President Moon Jae-in calling the North's activities "provocative" while defending a submarine-launched ballistic missile (SLBM) test he attended as self-defensive in nature.
In a statement issued late Wednesday evening, North Korean leader Kim Jong Un's younger sister Kim Yo Jong took issue with Moon's remarks and similarly defended her country's weapons developments.