Russia’s defense minister makes unannounced visits to Pyongyang and Ukraine, claiming North Korean troops are stationed in Russia and ready to support Russian forces – our analysis editor Ros Atkins, with BBC Verify, has been looking into this What we know about North Korea’s so-called military operations.
Produced by Catherine Carelli, Richard Owen-Brown, Vitaliy Shevchenko, Olga Robinson and Jack Kwon.
