Russian president Vladimir Putin (L) and North Korean leader Kim Jong-un visit the Vostochny cosmodrome in the Amur region of Russia, on September 13th, 2023. Photograph: EPA North Korean leader Kim Jong-un has invited Russian president Vladimir Putin to visit North Korea during a rare summit in Russia. The two leaders’ meeting has stoked US concerns that a revived Moscow-Pyongyang axis could bolster Russia’s military in Ukraine and provide North Korea with sensitive missile technology. Mr Putin accepted the invitation, according to North Korean state news agency KCNA, though there was no immediate confirmation from the Kremlin. Since Russia’s 2022…