The war in Ukraine risks turning into a protracted conflict that Russia will eventually win, a leading think-tank has said.The report by the Royal United Services Institute (RUSI) warned that current Russian advantages and Ukrainian weaknesses are leading to a style of conflict that favours Moscow.The capture of the city means that Russia has essentially gained control of the entire Luhansk region, marking Russia's biggest victory since it captured the southern port of Mariupol in late May.Ukraine's military intelligence chief Kyrlo Budnov said his defence forces had withdrawn "to advantageous positions in order to gain tactical superiority" after the Russians...