A news conference in the Oval Office has erupted into naked tension, as Trump yells at Zelenskyy to be 'thankful' to US.
'No alternative to democracy,' says Abdullah Ocalan from prison.
Trump wrote on social media that Volodymyr Zelenskyy was not 'ready for peace if America is involved'.
Vatican says crisis caused pope to vomit but he was given non-invasive mechanical ventilation and responded well.