US-mediated peace talks on Ukraine collapsed in less than two hours after Ukrainian leader Volodymyr Zelensky claimed it was unfair that Donald Trump was placing more pressure on his country than on Russia.The second day of talks concluded on Wednesday, though neither side signalled they were any closer to ending Europe's deadliest conflict since World War II.The talks wrapped up after just two hours, much shorter than the six hours of meetings on Tuesday, according to the head of Russia's delegation.