Russian nationalists called angrily on Sunday for President Vladimir Putin to make immediate changes to ensure ultimate victory in the Ukraine war, a day after Moscow was forced to abandon its main bastion in northeastern Ukraine. The swift fall of Izium in Kharkiv province was Russia's worst military defeat since its troops were forced back from the Ukrainian capital Kyiv in March. (snip)Moscow's almost total silence on the defeat - or any explanation for what had taken place in northeastern Ukraine - provoked significant anger among some pro-war commentators and Russian nationalists on social media. Neither Putin, who is Russia's...