US President Joe Biden delivered a firm rebuke of Russia’s “brutal, needless war” in Ukraine during an address to the United Nations General Assembly in New York on Wednesday.He said Moscow “shamelessly violated” the UN charter with the invasion.”If nations can persue their imperial ambitions without consequences then we put at risk everything this institution stands for,” he said.Biden’s address to the UN comes only hours after Russian President Vladimir Putin ordered reservists to report for duty to fight the war in Ukraine.