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![YouTuber Rhee Ken, who formerly served as a Korean Navy special warfare officer, uploaded this photo on his Instagram account Monday along with the caption “BOOTS ON THE GROUND.” Rhee wrote Sunday that he was on his way to Ukraine to fight and defend against Russia. [RHEE’S INSTAGRAM]](https://image.koreajoongangdaily.com/11147029.jpg?imageId=11147029&width=240&height=184&format=webp&format=jpg)