North Korean leader Kim Jong Un has paid an emotional tribute to soldiers killed while fighting for Russia in its war against Ukraine, saying his ‘heart aches’ in a rare admission of military losses. Kim made the comments on Thursday at a ceremony in Pyongyang, where he met with commanders of a unit that had fought for Russia in the western Kursk region, according to North Korean state media KCNA. He praised them as “a heroic army,” with state media photos showing Kim pinning commendation badges on soldiers’ uniforms. Photos released by KCNA also showed Kim pinning badges on the...